I can't open an old database in ChangeAuditor 7.0.3

Hi, I currently have ChanceAuditor 7.0.3. I have old databases from 2015 (Created with another version of ChangeAuditor) and it does not allow me to open them. when I open it I get the following error: "Incorrect product Version. Would you like to upgrade the database?"

When I select "yes", it cannot be upgraded. Error: "Upgraded in progress, cannot start" "ChangeAuditor.Sys.DbInitializer.Initializelmp(DatabaseProgress progress, Boolean create TimeBatchedIndex)

I think this version has another database schema and that's why I can't open my 2015 database. The question is, how can I open this ChangeAuditor database? Do the current versions of ChangeAuditor support older version databases? From which versions? 

I hope you can help me.