Premiere Elements 18 and PSE 19

Get the PSE + PE 2020 bundle and save $50.

https://www.adobe.com/products/photoshop-premiere-elements.html

>>>Is there a way to upgrade to the newest one without purchasing a whole new version?

Adobe has always offered upgrade pricing for Photoshop Elements and Premiere Elements and you can upgrade to the latest version from any previous version. These upgrades still install a brand new version of the software on your computer.

See https://www.adobe.com/products/photoshop-elements.html

It pays to shop around though. You can often find the full version for cheaper than the so-called upgrade cost.

If you mean Photoshop Elements 2019:

There is no upgrade, per say..  The "upgrade" is just a price discount on the new version.

I've moved this from the Premiere Pro forum (which is the forum for issues using the forums) to the Get Started forum.