Thanks for looking into the issue! I tried with the 1.47a build (placed the EXE in the existing 1.46a distribution as suggested), but unfortunately still got a crash using the same scenario, at the same moment, when the toolpath is being computed and shown.
Here is the new log: PixelCNC 1.47 test - Pastebin.com
I hope this helps ! Let me know if you need any additional information.