How can I get an extension into an existing project, without creating a new project?

I started the PiCaboo tutorial to learn image classification. I developed a page for my app in this, and am trying to move it into an app that I already made. I've gotten the blocks into my app, but now they won't work unless I have the PersonalImageClassifier extension in. When I try to upload it, it says it needs to be an AIX file, and files like the PIC only can be in new projects. I also can't make a new project, and add everything into that because there is already one extension in the project that it was started off of. Is there another way to add the PersonalImageClassifier in?

You can download the aix here

How to import extensions see here
http://ai2.appinventor.mit.edu/reference/other/extensions.html

Taifun

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