Windows 10 Creator Update versus Fonts and Corel Manager X8 / Bitstream Font Navigator 17 [X7]

I'm pulling my hair own dealing with a fiasco involving Font Manager X8 on two Windows 10 Pro systems. One of them is my work desktop PC and the other is my notebook at home. MS pushed Windows 10 Creators Update to both systems a couple weeks ago. But this font issue just started hitting hard yesterday. Basically nearly all the fonts I installed on these computers are uninstalled. Only the fonts bundled in the OS and fonts bundled with Adobe CC applications are present.

Corel Font Manager X8 is still showing all the missing fonts, but the font preview under each font name is changed to Arial. I'm having to go through and uninstall all of those fonts out of CFM. I've tried deleting the font database in C:\Users\UserName\AppData\Roaming\Corel\FontDatabase\V1 to see if that could flush out any corrupted data, but it doesn't work.

Another aggravating thing: some of the fonts I install directly through Windows' own font installation setup still won't appear in CorelDRAW X8. That's pretty infuriating. They're valid fonts and they show up in other applications.

My own opinion is Corel should seriously consider getting rid of Corel Font Manager. Its performance is absolutely terrible. It slows CorelDRAW X8 down to a crawl. It takes way too long for X8 to launch and it also takes way too long for X8-generated .CDR files to open. The year is 2017, but this stuff reminds me how slow and primitive computers were in the late 1980's. If CorelDRAW is going to survive against the growing onslaught of the Adobe monopoly it simply cannot afford technical problems like this. I've already been using Adobe Illustrator alongside CorelDRAW for many years and issues like this will force me to get a lot more of my work done in that rival program. I prefer doing my sign design work in CorelDRAW, but I can't get my work done if I'm going to be fighting something as simple as freaking fonts not showing up in the font menu.