I was able to use that compiled UFL. I did not try compiling it myself.
I did notice that dll was compiled with AnyCPU, not x86 so I'll probably put mine back to that. You can see that in dotPeek that it is an MSIL assembly.
I looked at the installation bat file in your zip and noticed it used the /codebase arg on regasm. I do not think I used that arg. I will try that and report back.