Newer versions of MyPaint weren’t opening for me either but now I got it working on
MyPaint V2.0.1 on Windows 7
Try this:
- Uninstall Python.
- Install the latest version of Python that’s compatible with Windows 7 (I tried Python 3.8.7 and it worked but first I had to install the KB2533623 Windows update and restart my computer, then install the newer Python).
- Now try installing and opening MyPaint V2.0.1