Notes Window Freezes Program

I've been having a problem for about a week where the Notes window seems to freeze the entire desktop version. It will be difficult to capture a log of it, because it's intermittent, occurring perhaps 10% of the time.

I use the free version, though I have many books in my library because I'm a longtime Bible software user, and I've been migrated several times to a new program when my previous one was bought out, bringing my library along with me.

Sequence of events:

• I have a custom layout open with five panes: a collection of books in one, three panes with individual books, and one pane for Search.
• I right-click a verse in the collection pane and select Add a Note.
• A new pane opens with a Note for that reference.
• I enter my note.
• When I attempt to close the Note pane, the X close button is nonresponsive. The same is true of the pane with my books--when I attempt to go back to it, the program is frozen.
• The X close button for the entire program is also nonresponsive, requiring Task Manager to close it.
• Task Manager has several Logos processes open, including several that say something like PEF.
• I must End Task to close the program.
• When I re-open it, everything is fine. I'm able to create multiple notes, and eventually the freeze recurs.

I've seen several other posts about similar problems in the past, including a recent one where I initially posted about this. But a moderator felt my problem was sufficiently different to indicate a new thread.