Can I edit mesh points after a solution, in order to rotate the solution.

Well hot dog!  Thanks.

How do I get the latest nightly again? I did this before to get the most recent pre-release:

pip install ngsolve==6.2.2202.dev38

But telling pip to upgrade with that doesn't work.

How do I upgrade my install to the latest nightly with pip?

You can check the latest pip pre-releases pypi.org/project/ngsolve/#history . As far as I'm aware, the nighly builds are not yet automatically released on pypi. I you need the latest nighly release, I guess your only options are to get the from the downloads section or build from sources.