Resolution
SYMPTOMS
You have got Plesk backup file with large size (for example 30 GB). When you are trying to restore such backup Plesk Restore fails with error:
SystemException: Out of MemoryRESOLUTION
To fix this issue you should:
1. Download updated file Plesk modules responsible for this feature
http://download1.swsoft.com/Plesk/Autoupdate/Windows/8.1.0/110132/psabackup.dll
http://download1.swsoft.com/Plesk/Autoupdate/Windows/8.1.0/110132/restore.exe
2. Extract it to %plesk_bin% folder but first backup the original files.