Configurations added to the configuration list can not be deleted or edited.
Deleting a configuration merely results in opening the editor dialogue.
Editing a configuration also opens a configuration editor dialogue, but changes made in the dialogue are not persisted when "Save" is clicked.
Linked issues
Comments 5
As of 2.1.5410 this is still broken.
Note that with the deb packages, the launcher does not auto-update since there is no minecraft deb repo index. However, downloading and installing the new deb (2.1.5410) results in the same behaviour as in the report. I am having to hold back the version to 2.1.3676 to be able to edit configurations.
Also worth noting that the instruction for command line installation of deb packages on the [download page|https://www.minecraft.net/en-us/download/] are incorrect; the instructions say to use `apt-get install Minecraft.deb`. This will not work as `apt-get` takes a package name argument referring to a package in a repo index rather than a local filename argument. The correct instruction would be `dpkg -i Minecraft.deb` (variously with a `sudo` prefix).
This has been adressed. Try restarting your launcher and see if this still happens.