Heya! If anyone still uses Magic Launcher for Optifine 1.13.2 like me you may be aware it does not longer works with ML. I've attempted a workaround, by comparing 1.12.2's json and 1.13.2 and the way it works, the "minecraftArguments" is no longer used in 1.13+. Instead it uses "arguments: game: blabla" to work.

I replaced arguments into minecraftArguments and removed every ", " but keeping json formatting and when I tested it on Magic Launcher, it worked! I got Optifine 1.13.2/1.14.4/1.15.2/1.16.1/1.16.2 to work with Magic Launcher even I can make snapshots to work aswell but my main concern is making future versions to work with Magic Launcher, despite being unsupported maybe?

Using vanilla 1.13.2 (and optifine) without my workarond throws this error
https://pastebin.com/Rc2mxnDQ
I noticed there's issues about this related to TLauncher which I'm not using it and what I've seen it misses ASM classes I don't know?

What I'm asking, if Sp418x can add 1.13+ compatibility for Optifine (including vanilla snapshots, future versions of Forge, or other launchwrappers like labymod? ect) but asking support for Forge or anything is quite offtopic. So I can avoid using my own workaround everytime I need to edit the version's json file manually to make it work (eg snapshots). I keep the original version then copy-paste it and I add ".ml" at the end of the folder/file names and in the json then rearrange the "arguments" to make it work :)

Also, my english is very bad so sorry if there's any bad grammar :X

PS: I've made this issue because Sp maintains (or its inactive/discontinued?) MagicLauncher and posts on minecraftforums.net seems to be ignored so I try seeking support here as Optifine development is active.

PSS: I know I can use Mojang's launcher, but the ** issue is, token based auth and sometimes it happens that they expire and forces me to re-enter the password and I never tried how many accounts Mojang Launcher can hold. I was lucky when Sp increased the limit to 100. That would be anotherr suggestion if Sp can add a config or increasing to 200 or whatever for offline purposes.