Ah, OK.  I  saw that "update" did not work from an older version using Python 2.7 too.   I guess it will not update python versions, though I am not sure of that....  Hopefully the ability to do a conda update will be useful until we switch to Python 3.8, which is probably at least a year away.

We did notice yesterday that - at least on Windows - the Warning that things may not work correctly if there is a space in the installation path is a correct warning.  Some of the things that we saw not work correctly include making the desktop icons or launching the applications from the auto-generated '.exe'  files.   I think this is not specific to Larch, and not something I'm going to be able to fix or work around easily.  For people who have a space in their username, I believe you will need to install to another folder.