Also, it would be easier for users if Scrivener automatically updated or if the “needs update” message would direct you to a Scrivener webpage that has a button saying “Click Here For Update.”
Updating from Windows Scrivener 1 to Windows Scrivener 3 is not automatic because it’s a paid upgrade. People tend to get upset when things that will cost them money happen unexpectedly.
I bought Scrivener two years ago and have been updating. I followed the link above and it downloaded the trial version. How do I update the version that I purchased?