I believe the only thing which is not working for AvantGardeDIA is installing the tool using the "Tools > Tool Store" menu item in Skyline.
If you go to the Skyline website and download the AvantGardeDIA zip file, you can install it in Skyline using the menu item "Tools > External Tools" and then pressing the "Add > From File" button.
That is, go to the AvantGardeDIA external tool page:
and click the "Download AvantGardeDIA" button to save a .zip file.
Then, in Skyline use the "Tools > External Tools" and then "Add > From File" button and point Skyline at the .zip file you just downloaded.
The Tool Store not working for AvantGardeDIA problem in Skyline will be fixed in an upcoming release of Skyline-Daily.