Installation crashes if Pyfa is already open

[blitzmann]

1. Open Pyfa
2. Try to install with .exe to the currently opened pyfa's location

this shows:

You accept the option, and then the installation hangs on:

Unsure if this has always been an issue or if it's with recent release.

[blitzmann]

I looked into this today. Windows event log is giving a Application or service 'pyfa.exe' could not be shut down.. I have no idea why.

I got around this by adding to the Inno Setup Script a function I found online that will halt the installation if pyfa is found to be running. It doesn't give the user an option to "restart" (which is where it was crashing), it just tells the user to stop pyfa, go back, and try again. See here:

https://gist.github.com/blitzmann/4bf7fcf96880d14d75b6