A wild bugfix release appeared! If the last version was working fine for you, you do not need to update.

Bug Fixes

• Default processes to empty array instead of leaving unassigned in driver detection by @Kuuuube in #4231
  • Fixes a crash when exporting diagnostics with a vendor driver loaded on Linux (regression introduced with #4188)
• Fix modifier key binding with mouse events on macOS by @AkiSakurai in #4233
  • Fixes modifier keys not passing through properly on macOS
• Fix pen button bindings not releasing on out-of-range by @AkiSakurai in #4234
  • Fixes bindings being stuck if pen is removed from tablet while holding pen buttons

Full Changelog: https://github.com/OpenTabletDriver/OpenTabletDriver/compare/v0.6.6.1...v0.6.6.2