Welcome to this forum, I and i'm glad you find the program useful.
I used to upload new versions upto the website immediately but found that occasionally I had introduced new bugs worse than the fixes, as a result new versions are uploaded here and to XBMC forums a few weeks earlier to allow for testing.
Once i'm happy that there are no major issues then I put them on the main webpage.
I will be uploading a new version here later on today and I will upload version 1.818 to the main website.