blender plugin not working due to deprecated bpy.app.version_char attribute in blender API

Hello.

version_char is deprecated since Blender 4.0 https://projects.blender.org/blender/blender/commit/345fc2b1f6de7624a09cd91048476e2a932f83fc

Now, at least in 4.3.2, it's gone for good.

I've peeped plugin and didn't see that uses the _char attribute where it stores that deprecated value.

Si, I've removed the assignement and, at least, the plugin can be installed.

To solve it until developers update the plugin for all, do that:

1. extract files from zip.

2. edit the file mixamo_rig/lib/version.py

3. remove line 7 (_char = bpy.app.version_char)

4. create new zip with the whole mixamo_lib folder

5. import the new zip in Blender.

6. be happier.

Hope it helps!