The right click -> Run as Admin is old legacy advice which doesn't make a difference at all with modern installers. All modern program installers automatically make themselves admin if needed, this is why you see that UAC prompt that asks you if this installer should be allowed to make changes to your computer, what that really means is that the installer have just requested admin permissions.

You can see it on the program icon for the installer if it will run automatically as admin or not. Look for the blue/yellow admin shield on the icon:

As for running CC3+ itself as an admin, that should be completely unnecessary. The old CC3 needed it because it kept all it's data files in the installation folder where normal users can't write, but CC3+ changed that by introducing the data folder and sets it up with write access for all users.

Symbols usually have their snap point (origin) set based on the intended use of that particular symbol. Especially things that are meant to go against a wall or next to another symbol have edge snaps.

The main downside in general here is of course that symbols may have more than one appropriate way of being used. And of course, sometimes the origin point is just plain and simple wrong.

I recommend doing as Sue suggest, just turn off snap whenever you need to place a symbol that doesn't snap like you want it to. Personally, I usually work without snaps when placing symbols anyway, it tend to be a little bit to regular if all the chairs are in the middle of their square and so on. Snap for symbols is mostly needed when you need that perfect alignment.

It depends a bit on what you did. If you just clicked :CC2SYMPATH: you should be able to click it again to toggle style.

Maps should also set the correct filter on load (commands in the OnOpenMacro map note), so simply reloading the map should normally reset the filter to the right one.

If it doesn't, make sure you haven't actually edited the global master filter definitions. If you right click the :CC2SYMPATH: button and pick master filters, you get to the edit dialog. You should then be able to load the appropriate list by hitting the load button. (You should check the map macro first to see which setting it is trying to load) and then make sure the first entry in the list is correctly set as CA177. (It is normal that the second entry is CD3 Bitmap A)

Yes, you can just copy stuff over from one CC3+ data directory to another, including symbols and drawtools and anything else in there. Just make sure you don't overwrite something you didn't intend to. But unless you have messed up your old data directory somehow, and you are running the latest update, most files should be the same anyway.

The only thing to be aware of when it comes to custom stuff, is the question if you made sure to always use relative paths. Of course, if the locations are exactly the same on the new PC it doesn't matter, but if they aren't, you may end up with some red X's if you have used absolute paths in your symbol catalogs and such.

Unfortunately, it doesn't support ranges.

Maybe doing selections by name instead will help? (It's a bit down the page in the article)