These maps are great as player handouts. I love how they describe the route and let the players know what to look for and what to expect without giving them a complete detailed regional map.

I currently have my players following a river with such a map in hand.

Try to first reboot your computer, then follow up by installing the latest update for CC3+ (downloadable from your reg page) before trying to install CD3 again.

There are also cases when antivirus software have interfered with the installs, so it is also worth trying to temporary disable your antivirus software. You can also ensure that the install really does run with administrative privilegies by right clicking the installer and select run as admin instead of just double clicking on it.

If none of that helps, I recommend you contact tech support.

The reason I did all that is because that doesn't just bring the flat image into PM, but also the height data and surface normals for a better representation. You only strictly need the surface map if you don't have anything else (which would be the result from making it using wonderdraft as the video did), but it can look better with normals and height map, and since FT3 do have the ability to export these, I added them to take as much advantage of the FT3 - PM combo as possible.

As for your seas, I guess you exported that one from the Gaia view in FT3. It is designed to be a simple pretty view, but it isn't configurable at all. Try basing the export on the altitude view or the texture climate instead. I believe that will give you better results.

I am not familiar with PlanetMaker, but it seem to just need a flat texture to import.

What I did as a quick test was to export my map as a 4096 wide jpg. (Using file -> save as and picking the jpg picture file file type)

Then I exported it again to a new file to get the heightmap, this time as a 16-bit greyscale png height file.

Then I switched to the normal map view and exported that as well, using the jpg picture file type.

Unfortunately, the way FT exports these, it keeps the unused area in the window as part of the image, so you need to crop them all in an image editor, make sure to crop them to the same size.

Then, in planet maker, set it up to use the tree textures you exported as surface, bump map and normal map respectively. (you won't have a specular map, so leave that blank, same with background unless you have something you wish to add there)

The update is downloaded from your registration page.

There is just a single update file (found among the CC3+ downloads) that will update CC3+ and all the installed add-ons. It should always be installed last, and if you install a new add-on at a later stage, reinstalling the latest update is always a good idea because it might contain update to the new add-on you just installed.

The community atlas is described here.