Can you

• Close ProSeries
• Open File Explorer and navigate to C:\BaseWin20\HomeBase
• Do you see CustomViews.xml and/or OtherAttributes.xml? If so, rename them to CustomViews.backup.xml and/or OtherAttributes.backup.xml
• Run ProSeries

If that works, can you email the backup file(s) to proseries_engineering@intuit.com too?