Edit Save File | Victoria 3

Change 1 to 0 to remove, or add new techs with =1 . Search for diplomacy_manager . Find:

relation= first="FRA" second="GER" value=50 victoria 3 edit save file

Example:

Change size to increase population. Search for your country tag, find technology section: Change 1 to 0 to remove, or add new techs with =1