you cant delete "installations" (edit: 1/3 of the pc's running this launcher can now delete them) , Most of the "installations" don't work now.
You killed the in launcher skin selector (F in chat). and your forums require me to make a new account. Where can i get the old launcher that works as intended.

Meanwhile i can see where i can select to launch the inferior Bedrock edition in the future on the sidebar, very nice.