You should be able to fix this by either replacing the DynDOLOD.esp file in the mod folder with the DynDOLOD.esp.bak file (remove the .bak from the filename) or by redownloading DynDOLOD and replacing the esp with the one in the download; Whichever of these you do, you should re-run the scripts, and everything should work fine. If it still doesn't work properly, then yes, you can completely re-install DynDOLOD, making sure it's in the same spot as before. As for your second question, yes you should be able to resume your save game.
