When I play test, and when I play the deployed game.  Q/E become Page up and Page down.... which are not my original keybinds...
Does the FSDK_AdvSaveHandler.js alter page up or page down or  Q/E keybinds? ... it works fine with out the FSDK_AdvSaveHandler.js deployed... but then again..I can't save anymore...

Hello, ianov!

The AdvSaveHandler plugin doesn't alter any keybinds. It's possible that there's a conflict with file loading (assuming that the keybinds are saved on the settings file). Check if there are any errors by opening the dev tools (pressing F12 opens them).