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ZAppLink is gone after re-installing

I’ve been having some serious trouble with ZAppLInk just as many people here.
One of the postings suggested deinstalling ZB, re-installing it without the ZAppLink and installing the ZAppLink plugin afterwards.
I did exactly that - with the result that the plugin isn’t there.

I’m not sure if I got the right installer. I downloaded it from ZBrush download center (http://www.pixologic.com/zbrush/downloadcenter/zplugins/)
but it’s not an installer, only a zip file.
I unzipped it into C:\Program Files\Pixologic\ZBrush 3.5 R3\ZStartup\ZPlugs\ZappLinkData (because that’s where it was before de-installing).
Still not there.

Any suggestions how to get it back?
And how to make it work? I followed all the other suggestions, but it resulting in ZB crashing right at startup.
Does this ZAppLink trouble have to do anything with Win 7?

The ZAppLink3x.zsc should be at the root of the Zplugins folder and then, the ZAppLinkData, located also at the root of the ZPlugs folder include psd files and a .dll.