Sometimes when you install the latest update, you may see this error message:

As long as the error message is about the Fcw32.mac file as in the image above, you can safely click ignore here. The error message happened because it failed to make a backup copy of your old macro file. Unless you have manually modified this file (if you are unsure, you haven't), clicking ignore is 100% safe since all that will happen is that the old file is overwritten with a fresh one.

They are cumulative, you only need to install the latest one.

Drawing tools select their own sheet by default, so users won't have to manually set the sheet before using a tool (Nor needing to know which sheet to pick).

You can manually change the sheet of any entity using either :CC2MCHANGE: or Move to Sheet (right click :CC2SHEETS:)

If you aren't doing it already, remember that relative coordinates are your friend when pasting with regular intervals. Since the next paste is relative to the previous one, one can mass paste by using the exact same relative coordinates multiple times in a row.

Not directly. I recommend drawing around the settlements with the tool, then placing individual trees after that along the edges to give a tighter fit (And finish off with a sort symbols in map to arrange them properly.)

There is also the exclusion commands, this allows you to specify areas to exclude, but this only work with polygons, not symbols.