Some years ago, after trying the client and finding it buggy and useless I uninstalled it.
I just reinstalled it today to see if things have improved (a bit surprised to see a Client BETA after 5 years of development

) but my owned games appear grey (because they are uninstalled? but showing them in normal colours would be more pleasant, no?), there's no install button, I can't see anything above the technical recommendations just a big empty square (I can see on the top left the very small default icon usually used to show there should be a picture displayed), I can't see which games I already own in the Free games section, I must click the Add to collection button to see the Install button, etc., etc., etc., Oh and the Log-out button wasn't responding... So basic functionalities are not working.
Before you ask, my PC configuration is the most common fully updated PC you can imagine without anything special installed or blocking.
So back to the clumsy Web version; I uninstalled the client again after 10 minutes of testing, I will reinstall it in 3 years to test it again ;-)