Memoir 44 - terrain question

Is there a way to remove the wire, for example, when necessary from the scenario maps?

From the module page:

  • Game Tips
    ** How to remove a wire or sandbags?
    *** Make sure you have nothing selected (left-click on empty background to make sure if you are not). Shift-left-click on the tile of the wire/sandbags hex. It will select with a black line. Right-click the tile and perform Delete, or use CTRL-D to Delete it.

On the right side of each scenario underneath the discards there is a yellow panel with 1 | 2 | 3 on the side. Click it to go to page 2. There it says:
Delete obstacle:
Shift-Click to Select
CTRL-D = Delete