We've updated UR to use a smaller indent size (about 1/3 of what it was before -- UltraRecall.exe 3.5.4.7 in Help | About | Install Info after installing).
Unindenting of formatted rich text doesn't in Word either, so I suspect we can't support it with the MS rich text control. You should be able to just delete the tab indenting characters.
Pasting of formatted text works as expected from Visual Studio in our tests. What application are you pasting from that results in poor formatting?
The keyboard shortcuts for indent/unindent can be configured via Tools | Customize | Keyboard (the Tab key is reserved for inserting a tab character, but you can assign other combinations to the Format -> Increase/Decrease Indent commands).
http://www.kinook.com/UltraRecall/Ma...zekeyboard.htm
And we intend to support configuring tab stops and indent size in a future release. Thanks.