BobF
For missing plugs, have you guys tried "Restore My Gear" in Custom Shop?

Yep...did that.  They are awol.  

Nope...they are nowhere to be found.  They don't show up in the Plugin Manager and are now greyed out in the various folders of my custom setup in the PM.  And they are gone from the Cakewalk-VST and Common Files-VST3 folders as well.  So...they are gone, baby, gone!
 

Can you download and reinstall T-RackS Custom Shop version 4.10?

Don't get this. Uninstalled my old T-RackS CS and then installed T-RackS 5 CS. 
Now I've got two IK folders, one called T-RackS 5 holding only an unzipped "T-RackS 5.pak" file at 601 MB, and another folder called T-RackS CS holding all separate plugin (.vpa) files weighing a total of 684 MB. Should I delete the second folder? Is it OK to just have the unzipped "T-RackS 5.pak" file?
Edith: and the individual plugins are not working in my DAW, so should I download every single v5.0 ?
Edith too: whatevvah, threw all CS files out, including all things ".vpa" and CS presets, so I'm only keeping the "T-RackS 5.pak" file and the T-RackS 5 presets.
 

Is there an uninstaller we can download separately to uninstall the old T-Racks entirely?

One thing I'll say for the IK tech team...they are hard at work on my standalone problem.  Together we are trouble shooting all kinds of options and possibilities.  And I think we've narrowed down the problem to having your display set at anything other than the 100% default...I have mine at 125% due to my old eyes.  Hope this means that they can send out a fixed version as I do not want to have my display defaulted to 100%...it's just too small for me.  

To elaborate on a workaround for the standalone not starting up, here are the steps that may work for some (they've probably gotten to this point with you, though, already yorolpal:
 
- Go to your program files directory for T-RackS 5 and locate the T-RackS 5.exe file.
- Right-click on T-RackS 5.exe and select properties
- Select the compatibility tab and under settings, click "Run this program as administrator"
- Check the "Override high DPI scaling behavior"
- In the drop down menu, change "Application" to "System" or "System (Enhanced)"
- Click "Apply" and then "OK"
 
This should not affect other Windows applications so your scaling should otherwise remain the same.  I know I can't go lower than 150% on this Surface Pro I'm on now or I'd go crazy and/or blind.

What was strange on my TR5 properties window is there was no drop down to change application to system or system enhanced.
 

It's probably because I recently had a Win10 update (maybe the one you mention) that totally killed my DAW so I had to roll back to the earlier version.  But when I check for Win10 updates it says I'm up to date.  Dern.

I got it installed bapu, but only on home PC. Wanna try to see if Sonar sees the new plug versions as the same or I get the "missing plugin" on that PC before I put it on the music PC.

Had to uninstall and reinstall to my c drive which was not where I have all my pluginsplugins, at least its running now. Still can't find some of the plugins . Figure I'll download the newest version tomorow and see how it goes.

Matron Landslide
Anyone else having an issue with the Classic EQ and the Linear Phase EQ not displaying the curve in the graph in TR5 standalone mode? I have seen others mention it elsewhere, it's also happening to me.

Mine's not showing the line either, just the dots.
 

Hard to swallow.