It is also worth to remember that in many jurisdictions companies are actually required to defend their patents and copyrights, if they don't it may result in it being invalidated in the future.

So even the friendliest company around WILL usually send cease and desist letters even to smaller actors, simply to show that they are defending their copyright and not ignoring it. Some people misconstruct this as treating their fanbase badly, but it is simply a required action to prevent third parties going to court and demanding it being invalidated because there a multiple parties using it, and it therefore cannot belong to a single company.

This is basically why asking first is the best idea, because if they have given you permissions, they don't risk getting into trouble themselves in the future.

Almost everything in CC3+ can be done using a command instead of using the mouse. If you have the Tome, there are full command lists at the end of each chapter (the one at the end of the CC3+ section is the largest), and it also came with an excel file that is found in @documentation\tome\ that lists all the commands.

Common commands also have shortcut keys. You can easily see this just by clicking a bit around in the various menus at the top of CC3+ (Or to avoid clicking, hit and release the Alt key, and the menu should be activated and can be navigated with arrow keys.)

You can even edit the CC3+ menu files and add your own shortcuts if needed.

There is a blog article available describing ways to find symbols (from your installed collections):

When you hide ALL other layers, you also hide the symbol definition layer, which cause all symbols to be hidden, no matter what layer they are on.

For the door, it sounds like you just were the "victim" of smart symbols and snapping. Smart symbols are intended to align symbols correctly to lines (like walls) and are mostly helpful, but there are situations where you don't want/need it as well. It also sounds like you may have snap on, but not cursor snap which can lead to some confusion because the snap doesn't happen until you click, instead of continuously.

So, right click the snap button in the lower right, and make sure both snap AND cursor snap is disabled (You usually don't want snap for placing doors, but you may want to turn it back on for other things, and then it is best to have both options ON). You should now be seeing the door snapping into place as you move the cursor. Which way it is oriented should be determined by which side of the line your cursor is on when placing it, so try subtly moving the cursor right across the centerline of the wall to turn it around (just a very tiny movement required).

If you cannot get it to behave, you can also turn off smart symbols by right clicking inside the map with the symbol on your cursor and just turn off the option called "smart tracking" which is what causes it to track lines.

For the fill style issue with the drawing tools, it looks like you have picked the wrong drawing tool style for that map type. That should normally be loaded automatically, but based on the fill I see in the screenshots, I think it should be set to "Dungeon DD3 color" and not "Dungeon SS2B". Is it right that you started this map using the DD3 Dungeon template"?