Circuit Tools 3 - Release Notes

Features

• Session Data in Load Window - The load window now displays session data (driver name, vehicle, venue, etc.) for the selected file, matching the behaviour of Circuit Tools 2.
• Back/Forward Navigation in Load Window - Back and forward navigation buttons have been added to the file open dialogue, making it easier to navigate between folders.

Bug Fixes

• Fixed a bug where only the first loaded file was used to populate the channels list. Channels specific to other loaded files were not shown, preventing comparison of those channels between files.
• Fixed a bug where the Export Reference Lap function did not produce an output file.
• Fixed occasional stability issues in graph refresh, video playback, and sector generation.

▼Version 3.1.24

February 2026

Features

• Measure Tool - A new analysis tool that allows you to measure channel data between two points. Select a region on the graph to see minimum, maximum, average, and delta values for selected channels in that region.
• Full Screen Video Window - Double-click a video to show full screen and double-click or press Escape to exit full screen.
• Lap Colour Selection - The ability to change individual lap colours has been reinstated, allowing you to customise the appearance of each lap trace.
• File Transfer Wizard Shortcut - Press F2 to quickly access the File Transfer Wizard for quickly copying files from an SD Card.
• Retain Window Layout and Size - Your preferred window size and layout are now preserved between sessions, so Circuit Tools opens exactly as you left it.
• Retain Load Dialogue Settings - File load dialogue display is now retained.
• Custom Circuit Overlay (CIR File) – Custom track map CIR files can now be loaded.
• Track Database Auto Update - Circuit Tools can now automatically update the track database, ensuring you always have the latest circuit layouts available.

Improvements

• Faster File Loading - performance improvements when loading large VBO files.
• Ideal Lap Video Generation – videos now generate more quickly via hardware acceleration where available.

Bug fixes

Stability

• Fixed a bug that could cause crashes when loading certain VBO files.
• Fixed a bug that could cause crashes related to concurrent operations during sector generation.
• Fixed a bug where the application would not start if the settings file was corrupted.

Video Playback

• Fixed a bug where videos could become out of sync after changing laps.
• Fixed a bug that caused the track map and video to de-sync when switching between AVI files in Sessions mode.
• Fixed a bug where hiding and restoring the Video pane in Sessions view caused videos for all selected laps to display instead of the expected single video.
• Fixed a bug where playing a file without video would give white noise.

Graph Display

• Fixed a bug where unfinished laps were not correctly drawn on the graph.
• Fixed a  bug where adjusting the Y-axis size on the graph caused inconsistent behaviour.
• Fixed a bug where the graph would not reset zoom level correctly between lap/session and file changes.
• Fixed a bug that caused data alignment issues when quickly changing lap selection.
• Fixed a bug where maths channel names were not translated on the graph.

Map Display

• Fixed a bug that sometimes made the map cursor remain visible after closing a session/file.
• Fixed a bug that stopped the "Reset Zoom" button from resetting the map correctly every time.
• Fixed a bug that caused track maps to not appear in the selection list.

Delta-T and Sector Timing

• Fixed a bug that could make a Delta-T jump appear at the start or end of a lap.
• Fixed a bug where sectors only showed Delta-T when "Ref" was selected for Multi Ideal Laps.
• Fixed a bug where setting a custom Start/Finish line in non-track database files prevented sector editing.

File Operations

• Fixed a bug where VBO files with multiple AVI video files would not load correctly.
• Fixed a bug with the file renaming functionality for VBO and AVI files.

Sessions Mode

• Fixed a bug where loading another VBO while in Sessions mode caused the graph to display incorrectly.
• Fixed a bug where the last sample of laps in Sessions mode had incorrect values.

Channels

• Fixed a bug where the channels list was unavailable for files with no laps.
• Fixed a bug where custom maths channel units were lost.

Other Fixes

• Fixed a bug that prevented the Start/Finish line from the file from being used.
• Fixed a bug that caused no data to be shown at unknown/non-track database locations in some situations.
• Fixed a bug that caused playback behaviour issues when Multi-Lap and Ideal Lap were both selected.
• Fixed a bug that caused playback to revert to the initial position when the graph cursor was not visible.
• Fixed a bug with the offset between ideal and normal laps after loading files with faster reference laps.
• Fixed a bug that caused cursor positioning behaviour issued when adding operators in the Maths Channel editor.
• Fixed minor UI bugs, including ribbon bar movement and tooltip display.
   

▼Version 3.0.250

October 2025

Features

• Latitude and longitude values now display in degrees.

Improvements

• Improved maths channel handling.
• Improved synchronisation of laps when selected laps have poor positional data.
• Improved handling of data with satellite dropouts.
• General stability improvements.

Bug fixes

• Fixed a bug where Delta-T could be offset incorrectly from the start of a lap.
• Fixed a bug where the Ideal Lap video jumped back after being paused when other X-axis types than position were used.
• Fixed several bugs with maths channels when the language was set to German.
• Fixed a bug where invalid characters could be used in file renaming.
• Fixed a bug where Delta-T values were incorrect when comparing laps at different log rates.
• Fixed a bugs that affected the functionality of the Accumulate and Integrate functions.
• Fixed a bug where the location of previously loaded file was not remembered in all situations.
• Fixed a bug where the Lap Selection changes that were made when the Video Pane was hidden were not retained when the Video Pane was restored. 
• Fixed a bug that caused an occasional misalignment between the ideal and reference laps.
   

▼Version 3.0.227

September 2025

Features

• Added the ability to add custom sectors directly on the map:
      Click on the Track Options button (...) on the Toolbar and select Custom Sectors to show the Sector Editor in the Map pane.
• Added a file rename facility.
• The CAN Channel naming from HD Lite files is now reflected in Circuit Tools 3.
• Files without video can now be 'played' in Circuit Tools 3.

Bug fixes

• Fixed a bug where pit lane markers would disappear when switching between Laps and Sessions modes.
• Fixed a bug with map being zoomed out after being hidden and shown again.
• Fixed a bug where sectors in the lap data table were occasionally extended beyond the scrollable area.
• Fixed a bug with maths channel units not displaying on the graph.
• Fixed a bug that caused issues with setting start/finish lines in some situations.
• Fixed a bug where changing the graph axis setting didn't refresh the graph data.
• Fixed a bug that caused issues when adjusting the sector count for custom tracks.
• Fixed a bug that prevented playback when the video pane was hidden.
   

▼Version 3.0.215

August 2025

Features

• Improved intuitiveness in the approach to setting a custom start/finish line on non-circuit DB files.
• The double-click action will now maximise the video pane.
• The Escape key will now restore the view if one display pane has been maximised.
• Full support of German in the user interface. You can change the language in Settings -> General -> Language.

Bug fixes

• Fixed a bug to ensure that the user-selected Ref lap is retained when a faster lap is ticked.
• Fixed a bug where histograms were not reflecting units once they were changed in the settings.
• Fixed a bug resulting in Channels occasionally being removed from the graph.
• Fixed a bug that caused the map trace to disappear when 1 of 3 open files was closed.
• Fixed bugs that caused issues with exporting a pit lane and the accuracy of the pit lane location.
• Fixed a bug that sometimes occurred when opening a file from File Explorer with more than 1 instance of Circuit Tools 3 open.
   

▼Version 3.0.206

8 August 2025

Bug Fixes

• Fixed a bug preventing normal use of Circuit Tools 3 when Windows was using certain display languages.
• Fixed a bug with delta-t displaying incorrectly when ideal or multi-ideal were set to Ref lap.
• Fixed a bug that caused occasional crashing when ticking and unticking laps quickly.
• Fixed a bug loading certain files that do not have an associated video
   

▼Version 3.0.200

7 August 2025

Improvements

• Improved ability to drag and drop multiple files onto Circuit Tools 3 to load

Bug Fixes

• Fixed bugs that caused issues when loading files from File Explorer.
• Fixed a bug when loading files recorded by a Lap Timer.
• Fixed a bug in playback when selecting ideal lap or multi ideal lap as 'ref'.
• Fixed a bug where video could become out of sync in one situation

Known Issues

• Custom start/finish lines present in .VBO files are currently not used.
• German language support not currently working.
   

▼Version 3.0.196

4 August 2025

Bug Fix

• Fixed a bug that caused the video player to undock from the UI.

Known Issues

• Custom start/finish lines present in .VBO files are currently not used.
• Video sync issues when setting the Ref lap to either Ideal or Multi-Ideal laps.
• German language support not currently working.
   

▼Version 3.0.193 (First Release)

31 July 2025

New and intuitive user interface

• Simplified toolbar.
• More responsive video and graph.

New Graph

• Clearer and sharper graphed data.
• Drag and drop data channels to stack them on the same y-axis.
• Double-click the Y-axis to auto-scale the data in the view.

Maths Channels

• A built-in library of maths channels, such as coasting, cumulative lateral acceleration, and steering velocity.
• Create custom maths channels with flexible maths functions.

Reporting with histograms

• Quickly identify trends and patterns in your data.
• Designed for fast visual analysis.

New Track Map 

• Includes sector highlighting.
• View your driving lines on satellite imagery provided by Google and Bing maps.
• Overhead car view during playback.
• Set Start/Finish directly on the map.

Multi-Ideal lap

• Provides a theoretical best lap across all loaded sessions.

Known Issues

• Custom start/finish lines present in .VBO files are currently not used.
• German language support not currently working.