Guys I´m having the same problem, but reading all your post I still didn´t figure out how to make it work.
<intelxdk:plugin intelxdk:name="https://github.com/cranberrygame/com.cranberrygame.phonegap.plugin.iap#4306f62a0d9683eca8d8be135533dd92f6a446c1" intelxdk:value="https://github.com/cranberrygame/com.cranberrygame.phonegap.plugin.iap#4306f62a0d9683eca8d8be135533dd92f6a446c1" />
<intelxdk:plugin intelxdk:name="org.apache.cordova.inappbrowser" intelxdk:value="org.apache.cordova.inappbrowser" />
Exactly where do I change the code, and where do I find the google key or something that was mention?
Just just checking.. are you Tanvir from Facebook C2 forum?
Firstly remove the above text from the additions.xml file. With the new XDK, you don't need the additions.xml anymore.
Goto projects-> Plugin Management->Add plugin->3rd Party-> Add "cordova-plugin-ad-admob"
Again Add plugin->Core Plugins->cordova-plugin-inappbrowser.
That should add proper references in the new XDK project