FPS target gets reset on app startup

[y2k04]

By default, the FPS target is set to 30 (3 in Registry). When you change the value, it gets updated in the Registry. However, relaunching the app will cause the FPS target in the Registry to be overwritten with the default value, instead of reading the value that was present.

Screenshots:
[Default value]

[Changed value]

[Restart app]

[AOx0]

Hi @y2k04 and welcome.
Thank you for the report; Once again, I can confirm I'm a bad programmer.

A PR fixing the problem would be nice, it should be quick to fix.
Else, just wait for me or any contributor to get a fix done.