In the program, open Tools > Options > Names. There you will find the setting whether to assume names of married women from the husband. Turn it off.

Please see the screenshot below:

Another option is to edit your own details by double-clicking on yourself in the tree, and enter a “married name” for yourself. Enter the last name you are using today in that field, and the software will stop assuming your name from the husband’s, and use that last name instead.

Please see the screenshot below: