In the text file which comes with OldNewExplorer it would be best if @Tihiy leave out his personal comments. Whether or not you like dark mode @Tihiy is not relevant, and your included opinion is not necessary.
This software is for advanced users only as stated in the instructions.
I download the compressed archive.
I then create a scheduled task for it.
The experimental DWMGlass.dll is simply copied to the Aeroglass folder, overwriting the original.
Run this in command window as administrator both BEFORE and AFTER SIB++ installation! schtasks /delete /tn "\StartIsBack health check" /f
taskkill /f /im explorer.exe & start "" explorer.exe
I do have the debug window which I hide by moving to a virtual desktop, but I do not have the watermark. I am on build 18908, and this debug version works perfectly! Thank you BigMuscle!
Aeroglass stays running no matter how many things you switch to during the day. It loads at start. You can check the task in Task Scheduler. Some themes may not work with Aeroglass though, so that could be what you are talking about.
You may want to try running this command as administrator
schtasks /delete /tn "\StartIsBack health check" /f
Then installing SiB again. If successful run command again.