Can I change the default directory for the tsave file on a WINDOWS system?

Use the TrueGrid^® Controls program to set the working directory.

For Windows 7 and earlier found with the start button:

=> => < XYZ Scientific Applications> => "TrueGrid Controls"

For Windows:

"TrueGrid Controls" is found in the XYZ Scientific Applications program group.

You might wish to increase your memory (Megabytes of Memory box) as well.