If you have an application set as the default for some action – for example, a particular
browser is the default for opening web pages – you can change that. Find the app
inSettings > Manage Applications, then tap Clear Defaults.
This also applies to launchers. If you want to try another one, then remove your current
selection as the default; whenever you press Home it’ll let you choose between all the
launchers you have installed, until you select a new default
