Hello Chris,
for on-premise systems, you can change this timeout, yes. The maximum is 24 hours.
However, I do not remember where to change this - it was in some configuration file on your frontend server, I recommend asking DW Support about this.
(And kindly update this thread if you found the location)
Hope this helps.
Greetings from Germany,
Simon H. Hellmann
DocuWare System Consultant