January 11th, 2015, 17:22
The only aircraft I have not been able to run in Win8 are those that use a particular anti-piracy scheme. These are the ALS-SIM Flanker, the SkySim Mirage III/5 (both by Mark Harper), the Virtavia B-1B and CH-47 and maybe one more from Virtavia but I don't recall what now. These all use the same anti-piracy scheme and all worked in FSX with a key. Win8 is just too anal I guess.
Only the Flanker uses the Flight1 installer so that is not the issue here.