We understand you are having issues with the program not reading from the database.
This will require removing the master.psDb file as indicated in the error message.
Please do the following:
Right click on the Start Button
Left Click File Explorer
Left click on the View Tab.
Place a check on Enable Hidden files if one is not already there.
Left Click This PC.
Double click on the file folders in the following order: C:\ProgramData\PrintMaster\PrintMaster 2020
Inside The PrintMaster 2020 Folder, there is a master.psDb file.
Delete this file or replace with this file that i have attached and attempt to run the program again.