The era of the free, external Modest Menu has effectively ended. While you can still find community guides on Reddit's r/Kiddions regarding how to bypass certain errors, the developer has officially stepped away. Downloading a "v0.9.6" file today is more likely to give you a virus than a level-up.
Rockstar recently integrated BattlEye Anti-Cheat into GTA Online, which effectively broke most existing external menus. modest-menu_v0.9.6.rar
It offered God Mode, teleportation, and "Minimum Job Payout" boosts without the heavy risk of traditional money drops. The era of the free, external Modest Menu
If you find a download link for this specific .rar file, proceed with extreme skepticism. Never disable your firewall or antivirus to run
Never disable your firewall or antivirus to run a file from an unverified source. The Bottom Line
Only trust files hosted on established forums with active moderator approval.