Nice cameo of my droolie avatar from Hebereke ;D~~

Some points:
- why did you hardcode the folder to C:/mamechess_2021?
- always starts that music when switching to the Index page or starting the program, even though I turned it off. It doesn't save this setting?
- complains about being unable to start Adobe Reader, so half of the program does not work for me (I use a lightweight pdf reader: sumatrapdf)