If you need to completely delete the Spycer licenses, delete them per the directory path of the OS described below.  Files in the directory should look something like these:

03/22/2013 04:27 PM 917 SpycerLicence.txt
03/04/2013 01:47 PM 714 spycer_license.txt
03/04/2013 01:47 PM 714 spycer_license20130304T124802.txt
03/04/2013 01:48 PM 714 spycer_license20130304T124923.txt
03/04/2013 01:48 PM 714 spycer_license20130304T125024.txt
07/17/2013 03:06 PM 979 spycer_license20130717T150616.txt
03/04/2013 01:51 PM 746 spycer_license_1.txt

MacOS

Open Terminal and change to the License folder and delete the files in the folder.

cd /Library/Application Support/DVS/License

(NOTE* not to be confused with the path starting from your user directory
[cd Library/Application\ Support/DVS/])

cd /Library/Application\ Support/DVS/License/
rm *

Windows

Open a DOS Window (Command Prompt) as administrator.  Start > All Programs > Accessories > and right click Command Prompt > Run as Administrator.
Change to the License folder and delete the files in the folder.

C:\Windows\system32>cd \ProgramData\DVS\License
C:\ProgramData\DVS\License>del *
C:\ProgramData\DVS\License\*, Are you sure (Y/N)? y

Linux

Open a terminal session.  
Change to the License folder and delete the files in the folder.

cd /etc/opt/DVS/License
rm *

Spycer Media Gateway

cat /etc/opt/DVS/license/spycer_license.txt