I've recently opened my game and saw that the modern windows that came with Sims 2 Open for Business (the ones available in red, yellow, blue, black and white) no longer have all their colors available, only red. I'm thinking this may be caused by some custom content, but the problem is that I've downloaded some stuff without testing them and since it's been a while since i played the game, I can't really tell now which CC may cause this.
My question is whther these recolors are available for download anywhere on the internet, or if there exists CC known for causing this, so I can look whether i have it or not. Thank you very much!

You need to get the last version of CEP as Apartment Life "bust" the CEP for those windows.

I have installed that version, but the recolors still aren't there. This is a problem I haven't had until yesterday. They just suddenly disappeared.

Have you included all the CEP extras? Unless of course it is CC recently added, in which case its 50/50 time