I've not figured out why nsis might use wow64232node but it does. So
I'll accept either variant of the reg key as a sign of successful
installation.

NB 2.45.1 also adds procmon to the set of tools

see also

https://gitlab.developers.cam.ac.uk/ch/co/wpkg/pstools-nsis/-/commit/d016bd55c7a70c37dde48dc3ebb2b5cde21ebf4e

wpkg's packages.xsd specifies that we should order elements as

<install><condition /><exit /></install>

rather than

<install><exit /><condition /></install>

I don't believe there's any need for both mainversion and patchversion; the
Chemistry package has always used just one without any problems.

Having the mst in a dir involving %mainversion% will lead to a maintenance
headache when doing upgrades. I've been using the same mst without problems
for a few years' worth of DC versions.

Call me a pessimist but I bet this package automatically updates - but
if I'm wrong then this commit will do nothing and be harmless!

Because these files are optionally copied, we can't just
unconditionally include them in the install check condition.

Automatic initial import of VisualStudio2013Runtime_x86.xml from git@gitlab.developers.cam.ac.uk:ch/co/wpkg/wpkg-packages

Automatic initial import of pgadmin4.xml from git@gitlab.developers.cam.ac.uk:ch/co/wpkg/wpkg-packages

Automatic initial import of anaconda3.xml from git@gitlab.developers.cam.ac.uk:ch/co/wpkg/wpkg-packages