.rar file help

Hello denizens of the Yume NIkki Wiki, I want your help with something. I got the 7-Zip File Manager to deal with various Yume Nikki stuff. The first thing I used it for was to listen to the full Yume NIkki Soundtrack, and then I downloaded both the newest (I think) versions of .flow and Yume 2kki. I could not get either .flow nor 2kki to work despite downloading various versions of RPG Maker. When I tried to use them a bunch of indecipherable text (probably the computer not recognizing Japanese) appeared and the program closed itself. Now even the Soundtrack will not work. I want to know what I'm doing wrong, as well as if I can get other games (probably Answered Prayers). Help me Yume Nikki Wiki, you're my only hope.