Shouldn't be a problem...

Did you unzip the file in a single directory and run it there? I notice in your question, you show path information and there shouldn't be any. If the file MSR.FNT (line 93) is opened in the same directory as the program, there shouldn't be any path (or problem).

I just downloaded the file again to test it. I created a directory called TUTOR and unzipped the file there. I copied QBASIC.EXE to that directory and ran TUTOR without problems.

The problem must be in some way related to where you've located the files.

In fact, here's a tip for all beginning programmers. Never include path information in any program you've created, because you never know what directories will be on the computer your program is run in. If a file is opened by your program in the same directory as the program, you don't need to specify a path. For example:

OPEN "Myfile.TXT" FOR INPUT AS #1

...will work in any directory, as long as the file is in the same directory as your program.

-Bob