Fall Blau is , unfortunately, dead.The add-on is with Discus , a Russian distributor or editor, which holds the rights to it. They have been sitting on it since August 2009. They haven' t released it and it's probably forgotten somewhere on a dusty shelf. I have no idea why they are holding on to it like a Scrroge instead of trying to sell it for a reasonable price.But then may be they aren't reasonable people?
I personally keep SP 1.4 because the fps are much higher than 1.5. I and others made some stuff that does not work on 1.5. The é mods are not compatible.