The next Dorico release was originally planned for October, but it will be delayed due to the complications arising from the closure of the online shop. There is a pipeline of other product releases queued up that are currently on hold, and that pipeline will only be unblocked once the new shop is available. Dorico will have to wait its turn as the release backlog is cleared.
The next Dorico release will be a free update for Dorico 5.x users, but it has some significant new functionality that we think will cause a decent number of people who have not yet updated from earlier versions to buy the update to Dorico 5, so we want to make sure the shop is available when the update is released.
We are taking the opportunity to continue to add more functionality to the update, so it will have even more improvements than we originally expected. I hope you will find it to have been worth the wait.