How to get your data back once lost during a powercut

We are the Livingroom Restaurant in Linlithgow and have been using the Samba Pos 4 system.
Unfortunately it stopped working due to a power cut over the weekend. We can still log in but all data seemed to be have been wiped during the power cut.

Is there a way that we can retrieve this data without having to input it all again?

Any help with this would be greatly appreciated.

Depends on the Database that you configured it to use.

TXT, CE, or SQL

It might simply be that your SambaSettings.txt file is pointing to the incorrect DB.