SUMMARY If a brush has a comma (,) in its name, assigning it to a slot in the 10 Brushes add-on will only work until Krita is closed. When it's opened again, the brush (and some or all other brushes) will be unassigned. It appears that the brush names are stored in ~/.config/kritarc, in a variable called "tenbrushes", and are comma-separated. Removing the comma from the brush's name in Krita fixed the issue. STEPS TO REPRODUCE 1. Name or rename a brush to something with a comma. 2. Assign the brush to a slot in the 10 Brushes add-on. 3. Close and reopen Krita. OBSERVED RESULT The newly set brush is no longer there. Other brushes may also be missing. EXPECTED RESULT The newly set brush should remain visible in the 10 Brushes window, and selectable with the appropriate keyboard shortcut. SOFTWARE/OS VERSIONS Operating System: Manjaro Linux KDE Plasma Version: 5.27.10 KDE Frameworks Version: 5.115.0 Qt Version: 5.15.12 Kernel Version: 6.6.16-2-MANJARO (64-bit) Graphics Platform: X11 Processors: 12 × Intel® Core™ i7-8700K CPU @ 3.70GHz Memory: 31.3 Gio of RAM Graphics Processor: AMD Radeon RX 590 Series