Migrating from other launcher is pretty simple. There isn't a lot you will need to migrate really. One thing you might want is your mini-map waypoints.

REI Minimap migration

These are the steps to migrate the REI's waypoints from FTB Launcher to the MYM Launcher.

  1. Open a new window and navigate to your FTB Install Folder
    • You can find the folder by starting the FTB Launcher and pressing options.
  2. From the FTB Install folder navigate to [FTB Install Folder] → [Modpack] → minecraft → mods → rei_minimap
  3. In another window, navigate to %AppData% → .mineyourmind → instances → [modpack] → mods → rei_minimap
    • You should be able to copy this entire path to your navigation bar.
  4. Copy all the .points files from [FTB Install Folder] → [Modpack] → minecraft → mods → rei_minimap to %AppData% → .mineyourmind → instances → [modpack] → minecraft → mods → rei_minimap
  5. You might have to rename some files depending on what method you use to connect to the servers
    • If you have been connecting to the lobby and would like to use direct connect on the MYM Launcher, rename your files to have the prefix "monster-new.mineyourmind.net" monster.mineyourmind.net.DIM0.points monster-new.mineyourmind.net.DIM0.points
    • Other Examples: monster-new.mym.li.DIM0.points monster-new.mineyourmind.net.DIM0.points

by slyder5649