Technical problem

[low_bidder]

No. Other then the original set-up, the .cmt file DOES NOT have to be resent.
I quit compressing my files ages ago (last century?). First, I doubt that it's possible to compress the .cmt. typical file size is in the hundreds of bytes. I don't like to compress the .dat because most of my transfer problems were due to compressiion errors. Compression works best with large text or video files. Something with a lot of repetitous data. You don't save enough file space or bandwidth to be worth the effort.
Unless you just like installing the game, you are spinning your wheels reinstalling.
The problem is a file transfer problem, NOT a program problem. 2 bad installs in a row? unlikely. 3? Not in a million years. IF you install 3 times and it still isn't working, check the gear. SP is an old program that has been around for decades and been worked on that long. It has been installed millions of times without a problem. A file swap is a file swap. Talk to your opponent.