It seems that vcheck is showing both the 34 and 44 versions, why would it do that?
Because it is set it up to do that. The new version has features that users requested (like larger file sizes) but the older version has somewhat faster multi-file compression that some users like.
Choose which one you prefer but remember that you can't install both using the Vcheck script.
Here is a link to the change log readme file in the Tech Database.
https://techsupt.winbatch.com/webcgi/webbatch.exe?techsupt/nftechsupt.web+WIL~Extenders/Zipper+!!NEWS~FLASH!!.txt (https://techsupt.winbatch.com/webcgi/webbatch.exe?techsupt/nftechsupt.web+WIL~Extenders/Zipper+!!NEWS~FLASH!!.txt)