when you import or create account, youll notice at the top right that the X has turned from blue to yellow, that means you need to click on "accounts" menu and then save, the X will then turn back to blue
what that does is in the same folder where launchpad is it creates an XML file of your accounts
did you notice when you 1st loaded launchpad it popped up with some weird garbage about cant load account and xml this and that blah blah blah
thats because when loading launch pad it looks for the xml, thats normal procedure
so
when you import create goto accounts >save
it writes/overwrites the xml
so i suggest do what you did before to get the accounts from other comp and then remember to click save after you imported them