Normal/default version. No antivirus causing trouble at my end.
Yes, Niche_Data was there and had stuff in it.
Would a file listing of it help?
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After playing for a bit via WINE, I'm going to go for a refund. It's not the install issue (seriously, I run Gentoo, I'm used to having to jump through hoops to get games to run), it's that I found the core gameplay more stressful than fun.