Full version turned into Demo mode after v15

[Isjix]

then your a handicap

Leave.

[Ad Bot]

[Thorax]

Waste of 700MB, unless you allowed multisession. :o

CD-RW?

[Radiation]

My game turned from full version into the demo mode (A.K.A. Key Deactivated)

That happens when you switch internet connections.
Just retype it. If that doesn't work, turn around 3 times.