I've followed the instructions outlined here, but it doesn't work exactly as I need.:
How to get InstallShield LE to uninstall the existing installation automatically? (apparently this has worked for other people, so it's worth having a look. If it does the trick, be sure upvote @JYelton's answer)
The result of these instructions are that I can install the application without having to uninstall, but now there are 2 separate instances of the application in my Add or Remove Programs window. It doesn't actually uninstall the previous version, it just installs the new version application along-side the previous one.
How can I make InstallShield uninstall previous versions of the application?
If InstallShield Installation Information is taking up around 200-400Mb, let it be. If you remove it to increase your disk space, it will do more harm than good.
Used on more than 500 million Windows systems worldwide, InstallShield is a powerful developer tool that ensures applications are correctly installed, configured, and updated on desktops, servers, and mobile devices.
Configure the new project to remove the old one by using the Upgrade Paths view: Add a New Upgrade Path, and browse to your previous .msi file to ensure it uses the right Upgrade Code. Then tweak the settings that appear, if necessary; typically they should be correct.
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