Make sure that you have a Named Cal License.
If you have that then tell your developers to follow the below stpes to lease the license.
First thing is server configuration.
QEMC -> System -> License -> Qlikview Server -> Here check the Allow License lease.
Once you do this.
Open the qlikview -> file -> Open in server -> Select the server on which you have assigned then the Cals.
Open any document and close it.
Now your qlikview will run on lease and will not show you the personal edition.