I play Minecraft a lot, and many of the mods that I download use .zip to open. So I used to do this before, but for some reason I uninstalled 7-zip, so I tried re-installing it. The file that I use to open .zip files is the 7zFM (7-zip File Manager). But whenever I try to set that application as the default program by finding it and selecting it, it just doesn't want to change. Please help!