You need to be able to disable the autostart. Not everyone uses this. sometimes I get two skypes going at once
Need to be able to disable auto start up. It eats resources, not everyone uses skype all the time. Also some prefer a different version. Which then results in double messages and double calls sometimes.
I get that they want folks to upgrade, but when the newest version isn't as usable as the last. Making the new version override the previous is kind of a distastesful move.