Installation question

When I go into my Control Panel, there are 5 listings for TANE, each one is 13 to 15GB's, but when I look into the N3V directory, there's only one. Is this normal? It just seems 5 listings at 13-15gb's each seems excessive. I have a 250GB HD and was running out of room. I couldn't understand why, so I went snooping.

Yes, it records each install or update but this is not an actual folder. Only the installed folder is counted in your HD and this may be bigger than the 15GB that was installed because of any downloads added.

Got it...Thanks!