Latest downloaded version of 7 (8/25/2016) did the conversion from 6.x in about an hour. It’s to be expected, as I’ve got around 30 IMAP boxes being checked (anywhere from 27-34, since they change frequently). This usually ran around 190MB max on 6.x…
However … Memory usage overnight on 7 is such that even though the program is “running” in Task Manager, it doesn’t display that’s running from the Task Bar. The only way to get it started again is to kill the small new task, and the memory-leaked task which is taking up nearly 1GB of RAM in Task Manager. I’ve had to do this twice today … Something’s clearly not right.