[BUG] Retopoflow crashes, dissapears and scales mesh when making new mesh

[VeronikaIsHere]

Retopoflow Version: v3.4.3

Blender Version/Hash: 4 and 4.1

 

Issue:

In a file where I have already used Retopoflow it is now not working anymore. Seems to be only in that file no matter the Blender version. When trying to make a new retopofow from from active or selection, Retopoflow crashes, dissapears from the UI and scales all visible meshes from originally ca. 30 cm to around 4 meter. Retopoflow is still in the Add Ons active. Turning it off and on doesn't change anything. Removing Retopoflow gives this error:

_"Python: Traceback (most recent call last):
File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\python\Lib\shutil.py", line 622, in _rmtree_unsafe
onerror(os.unlink, fullname, sys.exc_info())
File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\python\Lib\shutil.py", line 620, in rmtree_unsafe
os.unlink(fullname)
PermissionError: [WinError 32] Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird: 'C:\Users\nika\AppData\Roaming\BlenderFoundation\Blender\4.1\scripts\addons\RetopoFlow\addon_common\common\fonts\DroidSans-Blender.ttf'"

After closing Blender and opening it again it is back.

 

How to Reproduce:

• Selct highpoly mesh
• click sctive or cursor
• now Retopoflow crashes after showing "setting up target mesh" for a millisecond