I just installed Kontakt 4 on a new laptop running 64 bit Windows 7 and tried to authorise a backed up version of the Akoustik Piano library (without installing the instrument itself since it seemed pointless being defunct). However, despite the service centre having authorised AK (as part of my Komplete 4 bundle, some of which I had installed such as B4 and Pro53) Kontakt 4 refused to load the AK instruments as anything other than "demo" content. The only way I found to get it to properly authorise the AK library was if I installed the AK instrument. This is not an acceptable state of affairs. If the AK instrument itself is no longer being developed then sooner or later it is not going to be possible to keep installing the AK instrument just to be able to authorise the sample content (it already doesn't work on some systems apparently). NI keep insisting there is no need for a crossgrade to the Classic Piano Collection because the sample library itself is identical - well that may be the case but if AK owners are not able to authorise that sample library then essentially we are being denied the ability to use a product we paid for. If the library is identical but just requires a different authorisation process (which seems to be the case) then crossgrade all AP owners to the new bundle, and allow us to be able to keep updating, installing and using it.