BlockTheSpot has been superceeded by SpotX - thanks to the community for it's ongoing development:
https://github.com/SpotX-CLI/SpotX-Win
Current Version: 0.13
Last updated: 5th March 2019
Last tested version: 1.1.4.197.g92d52c4f
If you are using Spotify 1.1.5.xxx or newer, please use run the automatic downgrade script here which will downgrade to 1.1.4.197.g92d52c4f and also disable auto-update. Thanks @CHEF-KOCH.
Run Command Prompt as administrator and enter the following command:
icacls "%localappdata%\Spotify\Update" /reset /T
:warning: This mod is for the Desktop release of Spotify on Windows and not the Microsoft Store version.
Download and run install.bat. You don't need to download any other file.
PS - It's not encrypted at all, it's a batch file with the mod embedded at the end (see the "MZ" header). You can always use the manual installation method.
Download and drop netutils.dll inside the Spotify installation folder (next to Spotify.exe).
The default Spotify installation location is: %APPDATA%/Spotify (copy and paste into Explorer address bar)
To uninstall, simply delete netutils.dll from your Spotify installation (see above for the location).