Winamp 5.666 Trouble after Windows 10 update

[Orbis]

Hello Winamp community,

I am not sure if this is really a bug in Winamp. For years there were no problems with Winamp 5,666 until one of the last Windows 10 prof updates. Now the following inconsistencies happen after the start of Winamp:

1. A separate window with the Equlizer (Skin "Windows Classics") pops up outside of Winamp additionally. It can not be closed.
2. In the playlist, the font colors set by me are no longer correct after the start. I use the style Bento with "default". The font is bright green now. Nevertheless, I always have to manually select the Color Themes "default" again to fix it.
3. The boot process takes a few minutes (instead of seconds before)!

Therefore, I completely uninstalled Winamp 5.666 (including cleaning in Roaming DIR & Regedit). A new installation after that does not change the situation. Also the installation of Winamp 5.8 (3660) does not change anything.

Does anyone have an idea how to solve this?

Best regards
Orbis