ADE 4.5.2 for Windows (Newer version ???)

[L5E1E]

I am so confused. Last night I downloaded -with help from Adobe tech chat- ADE Version 4.5.11.187303.

But today, I am reading the following link with says ADE 4.5.2.  for Windwos.   https://helpx.adobe.com/digital-editions/kb/install-digital-editions-20-windows.html . Is this a newer version? And if so, what improvements were made?  Just putting it out there for the computer, savy community;s input.  Don't know where to go from here. Does one unistall the older versions to get the newer ones?  And let me also add the above link came originally from the Get Started with Adobe Digital page https://helpx.adobe.com/digital-editions/using/get-started-with-adobe-digital-editions.html 

Thanks.

[L5E1E]

NEVERMIND.... I figured this out...I found release notes.  https://www.adobe.com/solutions/ebook/digital-editions/release-notes.html .    I think there are many help pages within Adobe that need to be updated. I saw 4.5.2 and thought that was a newer release.  But 4.5.11 is a later one.  This just goes to show their help pages need some internal updating.  Very, very confusing for new users.  Their stuff is all over the place.