This program is written in Clipper.  Clipper has a memory manager that lets 
users run a program larger than their available RAM. 
It's called Virtual Memory Management.  DOS and Windows have a memory
manager called EMM386.  These two have always been designed to work hand
in hand.  The new EMM386.EXE in DOS 6.0 doesn't, it will conflict with the
manager in all Clipper apps and lock them up.  Hopefully, Microsoft will fix
this.  There are thousands of applications, from major corporation's business
programs to small shareware programs, written in Clipper.

     For now, there are a couple of ways around this:

     You can change the EMM386 device in your 'config.sys' back to the
windows device.
     It probably looks like this something like this now;
          DEVICE=C:\DOS\EMM386.EXE NOEMS
     you can change it to;
          DEVICE=C:\WINDOWS\EMM386.EXE NOEMS

Or you can install a 'switch' so that the two memory mangers don't conflict;
          DEVICE=C:\DOS\EMM386.EXE NOEMS NOVCPI