If you are a git user, you can install the theme and keep up to date by cloning the repo:
$ git clone https://github.com/dracula/sumatra-pdf.git
SumatraPDF-settings.txtand then open it (you may rename the backup to something like
Receive updates about this theme and more about Dracula.
This theme wouldn't exist without these people. Wanna help too? Check the repository on GitHub.