Having downloaded the update from v.3 via Steinberg Download Assistant (several times) I keep getting the message:
Steinberg Dorico 3.5 installation failed.
An installation package for the product Steinberg Library Manager cannot be found. Try the installation again using a valid copy of the installation package Steinberg Dorico 3.5
I thought it might be my elicenser had not updated. Indeed, when I checked, it still said Dorico 3, so I re-activated and (after a few attempts) it does now say Dorico 3.5. But still the installer stops about halfway through with the above message.
I have never had any problems updating from 1 (purchased on day 1 back in 2016) through 3.1.10 so this is unexpected. (I don’t know if it is relevant, but I did need to update my Steinberg store email address and password but the contact folks were prompt and did that for me.)