The explorer background color for Windows 10 can be changed permanently in a skin using SkinStudio 10 and changing the Window background color in the Change skin colours area, and select the Show me the skin defined system colours in the drop down menu. The only problem with this is that is changes other areas to that color also, so using a really dark color may not work out well.
It can also be changed in Windowblinds 10 by clicking on the Modify style link, then the Change system colors button. Then in the list scroll to the bottom and select the System Colour: Window item, then click the Change colour button. Again though, this may cause problems in other applications, so a dark color is really not recommended.
Which isn't very intuitive... Or ideal
It was my understanding that WindowBlinds under Windows 10 cannot skin the Explorer window background, or make is transparent, making all of these skins with dark explorer backgrounds not work at all as expected. Is that no longer the case, folks? Thanks.
This is more or less the reason why I am asking. I don't want this piece of software if nobody has any solid bug-free themes for it that work with windows 10.
Seeing as that I needed to post to the fourms to gather information, this program is probably dead. I don't see anything on WinCustomize (like 600 outdated themes) or on deviantart (themes are 95% bright, other 5% being dark and outdated)