I have 4.3 installed using the package manager in Mint.

When I start the program it mentions there's an update (5.3) and a non-functioning link to get the new version.

Instead, I went to the website and downloaded the 5.3 version and extracted the .tgz to a folder ... There's no installation file there.

I don't know what to do with the files in the folder ... can someone please assist me with general instructions on the upgrade?

Thanks.

Screenshot of files:
https://postimg.org/image/dku6dpp9p/