Now have DT4. MacBook Pro has repeatedly frozen up lately. No direct evidence it’s related to DT4, but crashes started after install. When I restart app, all previously open databases are closed. When I reopen one, I get a message saying the database is already in use. Since I know that can’t be the case (I deleted everything related to DT3), I click to open it anyway, and the Log window pops up saying the database has been verified. Any ideas?