I have opened my desktop app this morning & practically everything has disappeared !? All my Purchase orders & all Sales invoices. Please help!
I closed it and reopened again & all seems ok. Scary moment!!
So have you done another backup and copied it to another drive?
I hadn’t done recently, but will do now! It was really weird as when I opened it was a really small box so had to enlarge then noticed half my options were missing so had to go into settings & re check the boxes for the missing ones. But they then came up empty so closed re opened and all was back to normal 
@Fairies, it sounds like you opened a download of the program rather than the installed version. Make sure you get rid of or segregate downloads after installing them to avoid problems like this.