Funny enough, I asked the same question to myself. But after installing version 3, I was really happy. Besides the new/updated tools, the performance is much better.
The new HSL tool made me using HSL settings. Other tools are so complicated, you need a course to get the hang of it. This tool is so intuitive. A working repair/cloning tool makes getting little errors out of your images a no brainer.
I really hope the trail of v3 will convice you of upgrading.
@Yonni Still using Windows 7 will give you a bigger upgrade fee than only Photolabs. You’ll need to upgrade your whole OS.
The DXO team could easier get good upgrades to the software when they don’t need to code for outdated software.