Hi !
Outside of the new shake it everything else is the same and will still work,
The new shakeit will appear as a new plugin (the old one is still available in this build) so you can easily switch and compare both plugins if required (you can manage enabled plugins in settings)
Concerning profiles old shakeit and the new one are not cross compatible, but I've made huuuuge efforts on usability and flexibility about profiles and effects so it will be much easier to deal with it, the learning curve should be seriously reduced (at least that was my main intention
)
Sadly it's not possible to install it as a new program as the installer I use prevents that and will consider it as an update, but as seen above both plugins can live side by side so no worries about this