I have none of these programs running
Then, as I've said in my previous message:
If you are sure you are not running any of the above programs, then you might simply using another software that is behaving in a similar (invasive) way as those listed above, that we never heard before. Try to close all your running processes, until you find the offending one.
now that they are installed on my G: Drive they just won't work, could it be a program from my C: Drive that the Couatl.exe needs to read for it to be able to work?
If you reinstalled FSX from scratch, and all the FSDT products on the new drive using their installer, the drive can be any letter, it doesn't matter. If, instead, you MOVED the installation or some files manually, nothing will work.
But this is entirely unrelated to the above error message. That one can ONLY caused by another executable that is running on your system. That list is just the most updated list of programs *known* to cause this, but it's not definitive by any means, that's why I said to close all your running processes (with Task Manager), until you find the offending one, which is how all users that contributed to add new case to that list found theirs.