Since downloading version 1.5.1 in January (brand new user) and subsequently purchasing Premium licence, there have been 2 new releases which we were not aware of. It was only on the off chance we logged in today and found this out. We can also see that another release is due soon. You have suggested previously that you email your entire registered base except for micro-versions, however we believe that every release should be advised, as even a small change can make all the difference to some customers.
We are subscribed to KashFlow and look forward to receiving their emails with improvements/changes, which are done automatically. It would be great to hear from you each time as well.