There are both compressed files.
- ".jar" file can be open by any program, which can open ".zip" file (Winzip, 7-zip, etc.)
- ".uif" is ISO type compressed file, and as far, as I know, it can be open only by MagicISO (not free, however they have a trial version)
CAUTION! Any file downloaded from sources like "torrent" has to be checked against viruses, BEFORE you even try to touch them!!!