I have just discovered that I had over 1600 "uncleared" transactions. Some were in Cash - adjusted balance and all the old transactions got marked "R". Perfect.
Tried same in old closed and reconciled-at-the-time accounts and nothing changed. I can't seem to select by account to fix this. (It became an issue because suddenly yesterday there was a glitch that showed 2 closed accounts with negative balances. I was able to get rid of those with Validate. But I want all the now-showing uncleared transactions to show R so I can spot new phantom transactions!)
Selecting ALL uncleared transactions doesn't work because in real life there ARE uncleared transactions.