Logos desktop program freezes (but does not crash) when attempting a "basic search" or when changing layouts. The only solution is to kill the program using task manager and then restart Logos.\
6445.Logos Log Files.zip
Derek
As you are running the 5.1 beta you should report all issues in the Desktop Beta forum.
The Indexer log has an interesting entry
Info LibraryIndex 2 resources need to be indexed, and will be merged into an index of 32,690 resources.
As I doubt you have that many resources i recommend you delete the library index** and restart Logos (do so when you have plenty of time).
** C:\Users\derek.brown\AppData\Local\Logos4\Data\ehx014ls.iod\LibraryIndex
