Alright, Windows itself installed extremely quickly but installing stuff like Visual Studio took forever. It's now all finally done.

There are various issues in FileSieve that need to be fixed before I can release 4.20, so I'll continue work on it tomorrow (a Monday) rather than jumping into it mid-day on a Sunday. The Method/Modifier settings not being loaded at the right time is extremely confusing so will need a huge amount of thought and debugging.