GW Instek GLA-1000 Series Quick start guide - Manual (Page 16)

3. If there is already a setup file (*.gla) being saved,
the software asks whether to open it.
4. The display appears.
Demonstration Mode
You can still run the software without the GLA
hardware. When the Hardware connection failure
message appears, click Run Demo button.
Most of the software features are available, except
for signal capturing. You can even recall the old
waveform data to be displayed.