The 2014-09-20 release marks the first release of the 4e Ruleset as maintained by the community.
There are more bugfixes in here than I care to mention, plus all the themes, and the themes add-on incorporated.
We're including the content this time, not just the frameworks. So no need for the downloader anymore.
If you add
http://hl4e.cryptoknight.org/updates.xml to your sources list you'll be able to download the 4e ruleset with data, bug fixes, themes, etc.
I would recommend renaming the existing 4e directory you have in c:\programdata\Hero Lab\data\4e before downloading it because there will likely be many many MANY conflicts if you use the existing system.