Application quits immediately

[ybnd]

Various issues getting the app to deploy on Windows machines for the first time.
The "immediate quit" issue appears to have been a 0.4.1 issue, not planning to investigate that further.

TODO:

• "tech support call"
• Confirm whether MS Visual Studio C++ build tools are actually necessary
  Presumably this would be required by opencv, wasn't opencv-python supposed to ship binaries -- why is this still necassary?
  Just Python 3.10 seems sufficient on Windows
• Confirm whether Python 3.10 is necessary
  • What's going wrong with 3.8 exactly? (didn't work even in combo with the C++ build tools) don't care
  • What about 3.9? 3.7 don't care
• Once both are cleared up: document prerequisites
• Double check Windows installs w/ Python 3.9 and 3.10 but without MS Visual Studio C++ tools
• Maybe: clearer output in deploy script