I have the old .jar and .json files, and I’ve tried using them both in multimc as well as the standard launcher, and neither detects them as valid installs. Most of the stuff I see online is either wildly outdated or full of dead links. Any help?
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I feel like you may be able to do with Prism Launcher but I haven’t tried it myself.
Using PrismLauncher I believe you can play this version
Prism Launcher is the one to use, PolyMC dev was an asshole.