1. Back up saves and configuration
Create a separate copy of worlds, saves, and configuration files. Keep it outside the active game directory so a failed update cannot overwrite it.
2. Inspect the downloaded package
Check the archive structure. Source-code folders, build files, and repository metadata can indicate a source archive rather than a ready-to-install mod file.
3. Match versions and dependencies
Confirm the target game release, loader, required libraries, and any optional dependencies. One mismatch can prevent startup.
4. Perform a minimal first launch
Start with the smallest compatible configuration. If it works, add optional components one at a time and test after each change.
Practical next step
Return to the compatibility section to compare ecosystems, or review the Download section before opening the supplied archive.