I just started to have the same problem (15 Dec 2018). Initially got the the error: SQLite Error 1 - no such collation sequence RMNOCASE . I had to use Task Manager to get out of the program. Tried reloading RM program but no better. Now getting the: SQLite Error 1 - SqlDatabase: Cannot perform this operation on a closed database, and have to close prgm with Task Manager.. What should I do?
I have disconnected from Ancestry - Tools>File Options>Ancestry>Disconnect from Ancestry Tree - and the problem has disappeared - no more Name Index flickering and can now backup. Problem appears to be due to Ancestry, and perhaps other genealogy DB, connections.