Hey Scott, I am also Scott.
Anyways I had a similar issue last night and came across this post. I think I found your fix.
Since you are using uSimmics 5.9, you need to download the uSimmics 5.8 version.
This 5.8 version contains a file that seems to be missing from uSimmics 5.9 bin in which it.e.cad needs to open.
file name: QtOpenGL4.dll
I simply copied and pasted this file into my uSimmics 5.9 bin folder and then it.e.cad started to work.
I hope this works!
Best of Luck,
SK