The master configuration for your gymmaster terminal is done in a number of text documents.
For your convenience the files can be accessed from Configuration->General Configuration->Config Files
Each file controls a different component of gymmaster.
The relevant component must be restarted for changes made to the file to take effect.
Save config files makes the changes permanent, otherwise after running the update batch the changes will be lost.
Revert config files undoes the changes returning the files to the state they were in before they were edited.
Settings done in the config files only effect the PC they are done on. If your installation has multiple PCs running gymmaster be sure to redo the settings on the other PCs as apropriate.