Here is the version for Rule34.xxx: https://pastebin.com/H4LAjX7b and the updated version for the old one (Just some syntax things on my side, so no need to download the new one if you already have the old one): https://pastebin.com/q7ZDqLYp
You still have to create your own .bat file (just copy start.bat, rename it and change the text in it to the right .ps1 file)
I also added some comments on what to do if you want to change websites. Sadly it is not very straight forward and you kind of have to understand regexes, a little bit of HTML and of course some PowerShell. But they might help to give at least some pointers on what to do.