You can change several general settings of the game 'Diggles - Myth of Fenris' with this mod. Some of these settings are the population limit and age of your dwarfs.
Download the latest release of the DigglesModManager here: https://digglesmods.github.io/DigglesModManager/
Wiki: https://github.com/DigglesMods/ChangeGameSettings/wiki