How to license modeldebugger included in free Base_RevC_AEMvA_pkg?

I have three questions:

(1) I downloaded the free Armv-A Base RevC AEM FVP which includes modeldebugger. However, when I try to run the modeldebugger it seems to require a license. Where can I get this license?

(2) Also, what is the difference between The Foundation Model (Armv-A Foundation AEM FVP) and The AEMv-A Base Platform FVP (Armv-A Base RevC AEM FVP)?

(3) is modeldebugger the same as the debugger provided with the Arm Development Studio?