You may want to look at asdf, which has plugins for a LOT of language toolchains. Also. Many version managers allow me to have a .node-version or similar file

You may want to look at asdf, which has plugins for a LOT of language toolchains. Also. Many version managers allow me to have a .node-version or similar file in my project folder, and will automatically switch to that version for any commands run in that directory. Finally, have you considered supporting a config file similar to docker-compose? GUIs are great, but being able t have the config committed to version control is better!