However, after starting Mailspring automaticly Download the lastest version (1.15.0) and after I restarted the App It is now in the lastest version, How can I block Automatic upgrades for this App on Windows 10?
Open file explorer and go here: %localappdata%\Mailspring
Run the 1.14.0 installer (no need to uninstall 1.15.0)
As soon as 1.14.0 finishes installing and Mailspring opens rename “Update.exe” to “Update2.exe”
Then do CTRL+Q on Mailspring and reopen it
You have to do it quickly, before Mailspring checks that there is an update available. Remember to put “Update.exe” back to normal when this bug is fixed!