My files are compressed now but I've been struckling with this oddity for a quite a while now, well before the compressorizer was introduced to dowloaders, so no, it has no bearing to the problem. It's so strange. I even changed my PC to a newer one awhile ago, which of course meant that I had to instal everything all over again, including the File Manager. The problem stayed, however. I only asked now, because I wanted to know if anyone had managed to figure this out by now or if I was the only one having this problem in the first place. If not, then maybe EA managed to screw up the manager somehow.
If I manage to solve this then yes, I will post the solution but it doesn't look promising.