No, have a look at the install instructions in the readme. There are only four text files which overwrite your existing ones:
- export_descr_advice
- export_descr_advice_enums
- export_advice
- descr_model_battle

Though, aside from dmb, I doubt your versions of these files have changed from vanilla - the rest of the files you can copy in as per the readme instructions and they'll sit there without affecting anything if you restore your original versions of the above files.

If your using a heavily modded game then you'll have to check the list of units and settlements in the readme to ensure you still have them all.