Hi there,
Thanks for the kind reply. First off, you can only download content for items which you actually own. So if your seeing security errors, then you likely don't own the content in question. Secondly, the batch download manager is only avaliable in the Patreon version of Jav-It. If this is a feature that matters a lot to you, perhaps you would consider supporting me on Patreon. In addition to getting the latest version of the software, you will also get access to our private Discord server where more people are able to help you with any issues you may have.