Chief Delphi - PSoC Creator: Invalid Keil license key

I have installed Keil c51, PSoc programmer, and PSoc creator. First of all, there were no example projects in PSoc creator, even after refreshing. I did, however, find three example projects (BasicDesign, HelloWorld, BasicDesignLibrary); when I tried compiling a project, I receive:

LX51.exe ... ADC_DelSig_1.OBJ ...
Error: Invalid Keil License key, your license may have expired. Register Keil and rebuild project.
The command LX51.exe failed with exit code 3

Any ideas? Keil seems to be registered. Note that c51.exe and Ax51.exe work in the compilation process without issues.