After installing CCCP on Windows 7 32bit, in settings on 2nd page, I have the file association.
I associate the .avi, .mkv, .mp4 and .ogm to Media Player Classic Home Cinema (installed along with CCCP).
However, after applying, these do not get remembered. Videos are still opened with windows media player (which is not even configured).
When I go back in CCCP settings, the 2nd page file association gets reverted to "No Change" for all 4.
The installation was pretty much default (Full).