To be honest, it’s not worth to upgrade. I have both of them and I am extremely disappointed with newest one.
Let me start with registration process - any time you upgrade version 3, it spoils registration of version 2 and vice versa - Product activation required!!! It is extremely annoying behaviour. Whenever you register one of them, another one becomes dysfunctional and needs new registration. Isn’t it your duty Literatureandlatte guys to solve this problem firsthand when creating and uploading new upgrade!? Or do not let your left hand know what your right hand is doing?
Second problem is performance of v 3. Using it is always a bit of “shaky”, scrolling is wobbling (I have pretty good laptop for video editing so computer performance should not be a problem) etc. Responsivness is overall pretty bad and gets worse with every upgrade.
Third one could be of course matter of personal taste - styles, creating and using preferences in new (clear and modern) interface is pretty much more complicated and with less options. Maybe it is kind of “child disease” and we all survive it, but maybe it shows some deep concern over how company manages their product.