I made a terrible mistake. But its quite easy to fix but yet annoying to do so.
Installing Seismovision v2.22 LIGHT/FULL:
Create the directories into which you want to install Seismovision v2.22 LIGHT/FULL manually. Create a file named 'seismovision.exe' in the directory. Now try to install into that directory where you created the 'seismovision.exe' file. The FULL and LIGHT versions are behaving like the UPDATE. The UPDATE only installs if it can find a 'seismovision.exe'. This is completely my mistake and I'm sorry for any inconvenience. I will upload a fixed version tonight.