Where did you download it from, if I may ask?
Kid3 is available for automatic download and install in the Software Manager and Synaptic Package Manager, both built in to Mint as standard.
The Software Manager is a bit like an app store, except it's all free
Unlike Windows there is often no need to go to websites looking for software, the software in the Software Manager and Synaptic Package Manager are all safe and kept updated automatically, as stable software versions which shouldn't break your machine.
Oh.. Software Manager and Synaptic Package Manager are two different user interfaces to access the same core software management tools within Mint, so which one you use is simply about preference
My advice is to delete the files you downloaded for Kid3 and then use one of the interfaces I mentioned once or twice above
Hope this helps.