I currently have the task of building the next version of our software installer.
I have all the project files from out previous version (v16) and im currently building v17.
We are using InstallShield 2015 Professional Edition (version 22 | service pack 2)
I have the Basic MSI Project files here, I have changed the version number and made the changes required for the next version of our software - however, when i run the installer it says that i already have it installed (even though the version number is different)
Upon researching this issue, there is numerous posts about this, but i cannot find a difinitive answer as to which should be changed "Product Code" or "Upgrade Code" or both codes or neither codes or something else im missing.
Any help would be greatly appreciated.