Hi, please make sure you have used Authorization Manager to register the AmpliTube 4 serial in your IK User Area (not the AmpliTube 4 Custom Shop serial which is the free version) to start. AmpliTube 4 contains the gear listed on this page:
https://www.ikmultimedia.com/products/a ... php?p=gearYou can check that page for the gear mentioned in that popup from a preset. It may use gear from a collection that is not included with AmpliTube 4. You can try the gear via the Custom Shop application's TRY button for that gear if you are interested, though.
AmpliTube 4 comes with all presets so you can try gear out in context if you do not want to create tones from the ground up.
Edit - for those interested in knowing how much you get with iRig HD 2:
Note that with iRig HD 2, you get software worth more than the iRig HD 2 itself. AmpliTube 4 that you get is normally $149.99 and includes 10 stomps, 9 amps, 10 cabs, and 29 speakers, 4 mics, 2 rack fx, and 2 tuners (as well as the features of the full non-CS version). For iOS, the gear (or full app with the same gear) costs $19.99 and includes 17 stomps, 8 amps, 10 speaker cabs, and 2 microphones.