I have 34 pages of maps that needs to be converted into Maniaplanet 4.
Is there a way to download them all in one go? Or do I have to download them one by one?

I've PM'd you with a zip of all your maps on MX. 58 maps are already MP4 compatible.

I advise you to use the batch converter to upgrade your maps:
https://forum.maniaplanet.com/viewtopic.php?p=282170#p282170

Once you have a batch of maps upgraded to MP4, feel free to send a zip back to us and we'll update all of them on MX. That way you don't have to update each one individually on each map page.

Eventually we will update all the maps on the site, your maps included. But if you want to do them yourself, that will save us some work, as well as get them done sooner.

Thank you, eyebo!
You're a lifesaver.

I have buddies who makes a lot of maps, Wouldn't it be an idea to make a "button" to download all your own maps?
It would save you a lot of work.

If they or anyone else wants to download all their maps for conversion, send eyebo or myself a PM or post here requesting so, and we can send a zip of them for you.

Indeed, it's not much work for us, and we're happy to do it, if it's needed.