Sonar says MIDI FX plugins aren't installed correctly?

Since you can see the plugins in the list, they are installed correctly.
 
It sounds very much like missing Visual Studio redistribution packages.
That is a package connected to the version of visual studio that last built the plugins - very technical but just FYI. Visual Studio is the development environment from Microsoft used by many.
 
Names of these are "vcredist_x86.exe" or "vcredist_x64.exe".
x86 is for 32-bit and x64 for 64-bit software that is to run, so both is good to install.
 
It should be in the install. You should not have to worry about it.
 
But you can get it working more quickly by hinting support about it.
Maybe the forum hosts have links directly to these needed.
 
These can also be googled but you need to know which Visual Studio version 2005, 2008, 2010 or 2013 or something doing that. You can look in installed software in Windows which of these are missing - it doesn't hurt to have it all.
 
 

There are also security updates on these, to confuse even more.
VS 2005 is an update june 2011, to mention one I know about.
I ran a security update on VS, and suddenly customers had issues - new redist needed.
 
First I come to think of then is if installer is run as admin or not?
Did Steam miss that part?
Do you have to confirm starting it?
It might not install otherwise, don't remember for sure.

I'm not sure if it's steam elated or not. hm. Not sure how to reinstall it if that is the case though. I can just try installing all the redists although I'm pretty sure I have a lot of those installed because of other applications. It didn't ask if I wanted to run the installer, it just ran it. 

ViRiX Dreamcore
I'm not sure if it's steam elated or not. hm. Not sure how to reinstall it if that is the case though. I can just try installing all the redists although I'm pretty sure I have a lot of those installed because of other applications. It didn't ask if I wanted to run the installer, it just ran it. 

Try jeteague's suggestion.
 
If installer starts without you confirming, I don't think it's elevated.
 
Cakewalk Command Center let you confirm at startup - elevating.
Then as elevated it can run redist packages as child processes - and it also runs elevated doing that.
 
I don't have to run Sonar as admin, at least.

I've just tried running the 64 bit as admin and still no dice. I'll try loading a new project and doing it again, but don't see why that would make any difference.  In the current project, it says that the plugins are missing or not intalled, and when I open it, it says they installed incorrectly or are missing still. (They are actually there but won't run) Hmm. 

cross post
 

did you try asking in the steam forum?

THEY FINALLY WORK!!!

 
TL;DR
Try running steam.exe as an admin first. Then try doing ALL the updates (all the important ones anyway). THEN try closing the virus program.
 
Full story.
 
I first learned that even though Windows looks like it's not updating hundreds of updates (I had like 100, then I had about 64 more... then one more. After that it still didn't work. I checked the FAQs, disabled Malwarebytes (reluctantly might I add), and then BOOM, out of disk space... OH NO WHAT DO!?
 
Then I searched and found something called LinkShellExtention and learned all about the magic of Symbolic Links and Junctions (AKA: quantum file management).
 
THen after hours of updating, reinstalling SONAR, and rebooting, I decided to run Steam itself as an admin. Now I don't know which of those things fixed it... but it FINALLY WORKS!!! Thank God it FINALLY FLAPPING WORKS!!!  I honestly think it was the idea that I had to run steam in admin mode though. 
 
Thank you guys SO MUCH for all the help and support. I really appreciate it. :)