@ Gizmo; A friend had a real commercial disk version. But when I tried to load it, the disk has several errors. So, that one's out, unless he has a back up.
Right now My A2000 has 3.1OS on it. I may leave that alone for a while, since Super Base 4 pro works (even the page editor!). I have an old, real version of Super Base 4, so I am in good shape.
I also have MFF+ (Microfiche file plus) that even has an Extras disk. I haven't tried this one yet, but from the manual it looks promising.
I had completely forgotten about MUIBase. I have that some where too.
But - for things like a family & friends birthday database, a flat filer like FD 3 is fine. I set one up, and it does what I need. However, Super Base 4 will be used more now than I know it works fine in 3.1.