I installed the patch and lost all the sub-folders from my personal folders.
Uninstalled WLM did a sytem cleanup with both McAfee and AVG PC Tuneup then re-installed WLM.
Sub-folders still missing so added a new temp folder to each of my personal folders - shut down WLM.
Restarted WLM and all sub-folders had returned - then cleaned out temp folders.
Now back to where I was before I installed the patch.
Should have known better than to install a patch without checking its validity, especially after I just got rid of the dreaded, persistent Windows 10 updates.