[DEPRECATED] Simple Classic Theme

if you are on 1909 and you talk about explorer search bar i suggest taking ExplorerFrame.dll from 1903 iso and replacing it in system32 and syswow64

yes.
Remember to copy it from system32 and replacing it in system32, and from syswow64 to syswow64 ( do not use a system32 one inside syswow64)

I can't believe this place exists! 100% installing this on my Windows machine.

Hi, first of all, sorry if my issue has already been discussed in other post. I tried to follow the guide yesterday but I could not properly install the application because the mid left "install" button was gray out. Anyway,that's not the foremost issue, although it would be nice if I could solve it, the main problem is that after failing to install it, my windows explorer stays exactly the same but with the font of w98. Same happened with browsers, now the font in the search box for example is a little bit different than the one previous installation. There could be other apps that changed its font. For the record, I don't have ltsb or ltsc, I've tried reseting the font configuration in control panel and I've also tried clear type. Any clue about what could be the problem? Thanks for the help.

I really think someone should just write a new file explorer. Microsoft then can't rape it with updates and it would probably be a lot faster.

ExplorerContextMenuTweaker is still not working for me.

Nope.
I just test it for My VM.

Every time I use SimpleClassicTheme, Windows permanently revert the login/restart background color to the default blue, and I can't find any option to change it.