Admittedly this was discovered on user error and by complete accident when I was upgrading from PolyMC 1.3.1 to 1.4.2, And I hadn't copied the required files over (i.e polymc.cfg/multimc.cfg) and once they were copied over (and restarted playnite) it ran like a charm

I figured i might as well report it in case anyone else had run into the same crash.

(Playnite log file)
|ERROR|PlayniteApplication:Unhandled exception occurred. System.IO.FileNotFoundException: Could not find file 'C:\Programs\Minecraft (poly MC)PolyMC-Windows-Portable-1.4.2\polymc.cfg'. File name: 'C:\Programs\Minecraft (poly MC)\PolyMC-Windows-Portable-1.4.2\polymc.cfg'

Hi, I've been using this plugin with Playnite, and I've been enjoying it. However there is one enhancement that would make the plugin perfect for me. Would it be possible to add an option to make MultiMC instances show as one game on Playnite (with synced playtime between all instances) which gives you the option of launching into different instances when you press the "Play" button?
Thanks for reading!

Imported instances have no icon, as shown in the picture below

Each MultiMC instance has an icon internally, stored as <MultiMC>/instances/<Instance>/.minecraft/icon.png, I imagine it should be trivial to include this icon as the default icon when importing the instance into Playnite.

Scanning the folder where MultiMC.exe is will find nothing if you've moved your instances to another folder., and scanning that folder instead will give you the instances but no way to launch them. Could you add an option that lets people with a setup like this specify where MultiMC.exe is so that they can launch it (and if it's blank, it can continue its current behavior)?

Might look into making a pr but thought I'd throw this up
https://gdlauncher.com/

I gave the path to the folder where my prismlauncher.exe is but nothing shows up, not a single instance. Did I do something wrong?

PolyMC is a fork of MultiMC, made by the community after disagreements arose between the community and MultiMC devs.

As of writing this issue, Playnite will crash when loading the PolyMC folder as it can't find multimc.cfg, since PolyMC uses polymc.cfg. Making a copy of the PolyMC file and renaming the copy to multimc.cfg works just fine, but it would be awesome to have Poly supported by default. The extension will also fail to load any instances, as it tries to launch MultiMC.exe, when Poly is PolyMC.exe.

Besides the filename differences, Multi and Poly function the same. I do hope this wouldn't require too much work!

Well, to say the least, polymc fell apart and the majority of the people behind polymc were kicked from it, so they forked it and made prism it should pretty much be exactly the same. I renamed the exe and .cfg to polymc, and it worked. Simple workaround but proper support would be nice. PrismLauncher: https://github.com/PrismLauncher/PrismLauncher

Gives the error "authentication servers are down" when going through playnite's play action, but works fine when launching through Poly

Plugin ver: 1.6
PolyMC ver: 1.4.3
MC version tested 1.19

Online account is default.

Modpack Index provides various categories/genres for modpacks and they provide an api to import from as well. I understand this is a hefty task but would it be possible to import these tags (if found on Modpack Index) into playnite as genres? Also, huge thanks for making this plugin! I had been using a hacky workaround using emulators to import multimc instances and I never thought someone would make such a fantastic plugin for it.