Hi Melanie,
This isn't the experience we want you to have. Let us work towards fixing the issue.
Please check this article which has the steps to reinstall the older version of AVG PC TuneUp & let us know if you've already followed the same steps.
Also, please be informed that we've stopped the distribution of TuneUp Utilities from 2014. However, duplicate finder option is available in the older version of TuneUp (PC TuneUp).
Earlier this evening I installed the latest version of TuneUp. Unfortunately, I didn't realize it no longer has the duplicate finder, which was the reason I was installing it in the first place. I uninstalled it using Control Panel (or so I thought) so that I could install another version recommended by another support topic, which does have the duplicate finder that I want.
I tried installing the other program, but it keeps telling me I have another version on my computer which I have to uninstall first in order to install this version. Each time I uninstall the other version and try to install this version, the other version is magically back on my computer again. I've tried third-party installation tools, deleted registry keys, and every other suggestion provided on the internet and I still can't get it to completely uninstall. I've now spent 3 hours trying to figure this out and frankly, I'm about to give up and go with another company's program since this has been such a headache.
I chose AVG as I loved the earlier version of TuneUp Utilities, but frankly, this whole experience has been quite frustrating and if it isn't resolved soon I'll be sure to advise everyone I know not to use AVG products.
I attempted to follow all the steps, but I can't because there is a conflict with having a "newer" version already installed. Even though I've uninstalled it multiple times, it keeps reinstalling itself. I am not able to install the older version BECAUSE the newer version never completely uninstalls. The first step in solving this problem is to ensure the newer version is COMPLETELY uninstalled as that seems to be the reason I can't install the older version.
Development of old AVG TuneUp has been discontinued because of software updates, as all the software environment evolves. You can't install the older version AVG TuneUp.
The new AVG TuneUp is more stable and fully compatible with the latest operating system and programs.
However, we are still working on the product and new features are being added to it. We will certainly consider your query regarding Duplicate finder as feedback for our future updates.