multidevice license

[tripod2go]

 Secureline - I currently have 2 licenses for iOS and 1 license for the desktop mac. I like to know how to convert these over to a 5 device multi device license. What happens to existing license when I buy the multi?  Will expiration dates be extended or I end up with separate expirations.  Will they need to uninstalled and canceled then proceed with the new license?   
I have (2 iOS tablets 1 iOS phone 1 android phone and two desktops)  Trying to find the best way to cover these with as few license / renewals to keep track.

Thanks
Steve  (tripod2go)

[tripod2go]

An question which would help is verifying that the Multiple Device crosses platforms?  i.e. Android, iOS Macos(OS X) PC

[Raeken]

You can renew your license, only. Of course, only when it's next to the expiry date.
When you buy a new one, it will be a separated licenses and when the old one expires, you have to change it to the new one.