FitGirl does not create cracks; she repacks existing cracks (usually from CODEX or PLAZA). The "risk" is always the same with any cracked software—your antivirus will flag the crack file (usually steam_api64.dll or TGO.exe patched) as "HackTool." This is a false positive.
Increase your Windows Virtual Memory (Pagefile) size to allocate extra buffer space. Installer Stuck at a Specific Percentage the genesis order fitgirl repackfgselective full