.sobj was what I saw looking around a bit - had never heard of it. I got the free TS7, but yet to install it. Imports probably don't go back that far but you never know. If you have a copy of Win2K or 98 around, using VirtualBox, VirtualPC etc. to set up a virtual machine might be helpful for those old programs.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken