For some odd reason, when I right-click on a board listing on the left panel, it doesn't actually delete. Further, it sometimes seems to "copy" elements/nodes/etc from other boards that were previously displayed. Clicking on another board after the "deleted" one doesn't always load the contents of that board right away, either...I sometimes have to double-click that board to actually load it (and even that doesn't always work).
The good news is that the boards I want to keep are still there, but it's freaking me out given the amount of time I've put into the content already.
Other than that, most everything seems to be working fine as far as I can figure based on what you're trying to make this tool to be. LOVE IT! Well worth my money. And thank you, too!
Thanks for letting us know on this bug. Can you share a few more details on the issues you encountered?
P.S.: We take multiple backups per day of all user content so your data is safe at all times :)