I'm sorry it's being weird. I'm honestly not sure where those problems could be coming from, as I've never heard of them happening to anyone else.
The only way to change the fullscreen option without using the in-game menu is to edit the game's .ini file. Go to C:\Users\*YourUsernameHere*\AppData\Local\Sword_and_Staff, open the file called "sas.ini" with a text editor, and change the "fullscreen" option from a 1 to a 0. That should put the game back in windowed mode next time you start it up.
Again, I don't know what's causing your problems, but I'll add an option to disable the scrolling text altogether in the next build, and look into the fullscreen issue.