1. Please make sure you are using the latest instructions and download link here;
https://opensprinkler.freshdesk.com/support/solutions/articles/5000381694-update-opensprinkler-firmware-with-downloads-
2. Do not double click the executable while it’s still in the zip file. You must unzip the entire folder to your local disk, for example, desktop, and then double click the executable from the unzipped folder.
3. The instructions page has a video. If you encounter any trouble, please follow the video. Thanks.