What is your anti aliasing settings? These affect max export size in a big way.

My standard export size for the community atlas maps is 8192 pixels in the largest dimension, with 25% antialiasing which normally gives me no trouble at all.

In any case, a way to export maps beyond your capabilities is to export them in tiles instead of the whole thing at once.

And yes, running out of memory in this context is running out of the 4gb it can address.

To force the highest quality (Not normally required) just click :CC2RESMODE: and set it to Manual - Very High

Yea, I meant fixed. That's what happen when you type from memory.

The memory cache keeps bitmap images in memory instead of reading them from disk, which makes the loading faster. The -1 default size automatically allocates half the available memory, although I am uncertain if this is half of the max memory CC3+ can address [4GB] or half the system memory, I need to ask the developer about that. If the former, then you could potentially get some performance by increasing it above 2GB, but that really only helps if CC3+ needs that much memory (see the currently in use value). Increasing it if CC3+ doesn't need it won't help with anything.

I don't have the actual setup for that myself, so I don't know exactly where the links are supposed to lead, but you should find all the pdf's inside your CC3+ data directory (The directory you chose during installation, default is c:\ProgramData\ProFantasy\CC3plus). Most of the guides are sourced from annual material, so they'll probably reside inside the Annual subfolder, while I guess the compendium itself is probably in the Documentation subfolder.

Note that since you say "start learning", if you're not familiar with CC3+ at all, the best place to start is with the manual, which also contain many tutorials. You can access this from the help menu.

Note that as with any effect, Edge Fade doesn't work on a per entity basis. What it does is to find areas with a solid fill (i.e.) same color and fades the edge of those areas. This is basically usless to do if your entities have bitmap fills. In other words, this effects is mainly only usefull on a sheet where all the entities have fill style Solid.

That's the way of most things. Supporting old software costs money, and if the sales volume is low, it is a net loss. Still selling old maps that are now technically incorrect also causes a lot of confusion in the customer base when the maps don't match up with the books any more, leading to even more support requests and requests for updates. (Of course, it wuld have been nice if they continued their deal with PF and updated it for newer versions, but they had their mapping software in the lineup [Dundjinni], and the atlas maps wouldn't have been compatible with that.)

The FR atlas was a product commissioned by Wizards of the Coast, and the rights belong to them. They where also the ones selling it, not PF, and about the time when D&D 3.0 arrived and the FR maps had some drastic changes in some places, they stopped selling the FR Atlas with the outdated maps (Outdated if you play D&D3.0 or higher that is, for me still playing AD&D 2nd edition, it is highly relevant).
There are lots of nice maps in the FR atlas, but they are from the CC2 era, so they don't look all that nice compared to modern CC3(+) maps [No effects, no raster symbols, and while technically possible, raster fills weren't really used either]

Other products from the AD&D 2nd edition era was the Core Rules products, which included a product called Campaign Mapper, a cut-back version of Campaign Cartographer, which you could use to edit the atlas map if you wanted.

Looks great. You've done a good job with the map itself, and it is always so enjoyable to see both daytime and nighttime version of a city map. For a setting like that, the nighttime version also really helps giving a proper look at the situation.

Not sure what you mean by PDF assets, are you referring to the documentation/manuals? You can find these inside the Documentation folder in the CC3+ data directory (C:\ProgramData\Profantasy\CC3Plus\Documentation unless you changed the default installation location during setup)

If you can't get it working correctly, the best path is to contact tech support and get some official help. You'll find the support form on your registered user pages.