Thanks so much for getting back to me regarding this!
I was able to grant full permission for the application, however it's still not allowing the installation of maps (both the maps that came downloaded with the game, and the ones that are downloadable via the mission archive). Should I just re-download TDM entirely, following the steps listed on the wiki, or was there another possible solution to try (I checked both my internet access and mirror for the missions, both of which seem fine)?
Thanks again for your help with this, freyk! I greatly appreciate it!
*Also, here'