Hi Sebastian and thanks for getting in touch!
We’d be happy to help — but I do want to note that our pre-sales forum is used to answer questions about purchasing our premium plugins.
If you’re looking for technical support, it would be awesome if you could post your question to our <u>WordPress.org support forum</u>.
Or, if you already have an active license for one of premium plugins, will you please log into your account and post your topic to our premium support forum instead?
In the meantime, I would suggest that checking out our Themer’s Guide. It contains step-by-step instructions for customizing the calendar templates, which will allow you to add a full-width image to the top of the any template you would like.
Thanks so much!
Geoff