i found this cool program that lets you upgrade downgrade or use a modded jar its really a cool program
you no longer need to go into you .minecraft folder and change your jar names you can name those jars anything and use them like that
VS: https://www.virustotal.com/file-scan/...8a4-1316124522
VS: mclauncher.zip - Jotti's malware scan
images:
Operating Systems:
PC (Working)
Apple (Not Working)