Sellers have the ability to set download limits on the templates they sell. Some choose to enable this while others don't.
What happens if you hit the download limit on a template?
Although hitting the download limit should not happen often, it can happen. Most sellers try to make sure their customers have more than enough downloads to get their designs edited, downloaded, and printed.
If you hit the download limit on a template, you'll see a message in the Download dropdown stating so. This means you cannot download the template anymore.
If this happens in the normal course of editing your template, feel free to reach out to the seller and explain what happened. Most sellers will completely understand and will have no problem resetting the download limit for you.