Is there any way to go back to the beginning of a sequential file without closing it and then re-opening it? I know this is probably a stupid question, but I did not find anything about it
Yep, SEEK'll work. It sets it to the byte position in the file.
For most things I do just use random-access files. But this is a readme file and so I wanted to make it readable by any text-editor in case the person didn't want to find out if the program had a built-in readme viewer/help system