The updated version of the plugin broke the admin view of all my WSIWYG fields, which were working until the update. I did upgrade my database as instructed.
By "broke", I mean that instead of seeing the WSIWYG editor for WSIWYG fields, I now see a text box with HTML in it.
I'd already put in all my test and of course I'm fine with HTML, but when my client eventually goes to edit anything it will be a problem.
The fields continue to display fine on the site itself, so fortunately that end of things is OK.