Do NOT apply a FitGirl "Upd" for version 1.20 to a version 1.18 repack. Updates are sequential. She typically releases cumulative updates (e.g., from 1.19 to 1.20.1), not incremental.
An interesting feature of FitGirl Repacks, including versions of Minecraft, is the use of that significantly reduces the download size compared to the original files . minecraft fitgirl repack upd
Avoid "Repacks" for Minecraft. The risk of infecting your computer with malware far outweighs the cost of the game. If you want to play safely, use the official launcher, the free browser version, or the Microsoft Store trial. Do NOT apply a FitGirl "Upd" for version 1
However, FitGirl does release torrents for every single minor Minecraft update (e.g., 1.20.4 to 1.20.5). Instead, she releases a "base" repack and then separate Update .bin/.exe files posted on her official site (or mirror trackers like 1337x or RuTracker). If you want to play safely, use the