I copy and pasted the KEY: from my License->Details page and try to follow the instruction about offline activation but I get
SetLicenseKey status = 43
GenerateOfflineActivationRequest status = 43
int main() {
int status;
status = SetLicenseKey(<some string I copy from cryptlex site>);
printf("SetLicenseKey status = %d\n",status);
status = GenerateOfflineActivationRequest("request.txt");
printf("GenerateOfflineActivationRequest status = %d\n",status);
return 0;
}