Posts #4 and #7 on the other thread are attempts to answer your question. The discussion about SELinux (as I understood it) was whether it would interfere with what you were trying to do. If you find it does, I would concur that you should turn it off until you get your problem solved and then re-enable it.
Post #7 recommends you get used to the package tools (yum and rpm) from the command line rather than insisting on a graphical tool. I don't have enough experience with this to comment, although I am partial to the command line for administration.
In general, the advise on the other thread seems plausible to me, but I don't have specific experience.
Good luck.
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