How to make a setup file using InstallShield developer7 such that it will uninstall previous exe if exists and install new exe?

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Hi,

I have an Install developer7 project which creates a setup file for an exe.

But after creating a new setup file and installing in to the machine which is having the older version of the exe,it is not updating to the new exe.

Ideally i am expecting the older one(If present) to be uninstalled and install new exe when i run the setup file, which is not happening.

Please help me on this.

Thanks in advance

Srini