Update Remixd problems & instructions confusion
The Remixd - the instructions are (on npm) are:
uninstall the old one: npm uninstall -g remixd install the new: yarn global add @remix-project/remixd
so I ran: yarn global add @remix-project/remixd and it seemed to work (no errors)
But then when I ran remixd -v, the old version of remixd was printed out: 0.6.2
Then I tried npm install -g remixd - and that errored
Then I did a npm uninstall -g uninstall -g remixd
And then I ran remixd -v and I got the new version printing out…

this works fine for me. It might be an issue local to you.
Just to add, yarn global add @remix-project/remixd doesn't the post install script to install Slither and its deps.