Due to a bug in jDownloader 2, somtimes jDownloader keeps displaying captchas for downloads and wants to download the files using the free mode of the hoster.
The problem is that if a failure occurs, like a connection abort due to network connectivity or a random error by jDownloader, jDownloader completely disables the Premiumize.me plugin. As a fallback it uses the plugin of the hoster, which displays captchas because it's in free mode.
This issue can be worked around using the following procedure:
Note: You have to repeat these steps for each hoster.