How to upgrade SAP B1 Add on application version changes as always

Hi All,

we don't want to install and uninstall SAP B1 Add on again and again whenever the version changed.

Eg: add on version 1.1 has already installed on the SAP B1 server.

After developed add on version 1.2,I wanna only upgrade new version on the SAP B1 server without uninstall the old version 1.1.

If u have any idea,pls suggest to me.

with regards,

Syma