Thank you! So, I think #ROOTCONFIG# is to load the variables about UserAgent in the root folder of the skin.Sure - regarding ROOTCONFIG:
https://docs.rainmeter.net/manual/variables/built-in-variables/#SkinVariables
The date is just how the versions of JDWS-04 (the skin suite I was talking about earlier) are written by its author, JelleDekkers.
Basically, setting the UserAgent (i.e. the string identifying the browser or program that requests data from a site) to the name of the skin and its version helps in complying to the terms of service from Nominatim / OpenStreetMap, so you can better use their reverse geolocation data in such skins. This happened because some Rainmeter users allegedly abused connecting to Nominatim in the recent past, so sending the details about the program, skin and version connecting to the service helps to block / ban misbehaving skins or those using them.
Statistics: Posted by matif — Today, 4:00 am