Hello Bora Keskin and welcome to the forum.
Bora Keskin wrote:I downloaded 64 bit VST3 Amplitube 4, then I proceeded to enter my license code. A message popped up saying I was free to use whatever I wanted, but I only have the free stuff. Help me please everything else is locked.
Which version of AT4 did you buy? If you are trying to use the free (CS) version, then it comes with some usable pieces of gear but not everything.
If you have bought AT4, AT4 Deluxe or AT4MAX then you may need to do the following.
1) Open the Custom Shop app and log in
2) Click on the AmpliTube tab
3) Goto to Gear>Restore My Gear.
4) Open AmpliTube and check that all expected gear is available.
Let us know how you get on.