I'm posting this again, because the problem is still occurring in 4.5a Beta 5.
Details, logs, and process samples here:
http://community.logos.com/forums/p/44113/330670.aspx#330670
To recap: The first time I open the Versions drop down in the Copy Bible Verses tool, Logos locks up a moment later, beachball and all, with 100% CPU usage on one core, for an extended period of time. Note that this behavior occurs merely opening the drop down, whether or not you select anything. A few moments after closing the dropdown, the lockup occurs.
Eventually Logos recovers, and then the version drop-down can be opened with no further difficulties. Problem recurs each time Logos is launched.
The time it takes for Logos to recover on my Macbook Pro i7 2.3Ghz is about 2 minutes.