You might have a lot of projects you're trying to backup at once and its too big. Try selecting a few projects at a time and then choose to backup selected.
Step 1: Go to options, and back up settings Step 2: Go to C:\Users\your username\AppData\Roaming\GSA Search Engine Ranker Look for projects folder. Right click on it and select to send to compressed zip folder.
With those 2 files ( settings and projects ) you can fully restore your VPS on any pc \ vps
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2 steps
Step 1: Go to options, and back up settings
Step 2: Go to C:\Users\your username\AppData\Roaming\GSA Search Engine Ranker Look for projects folder. Right click on it and select to send to compressed zip folder.
With those 2 files ( settings and projects ) you can fully restore your VPS on any pc \ vps