There seems to be a problem with the latest stable and nightly versions - the latest stable version should
0.8.1 - 8823 (which also equals nightly 8503)
But the homepages gives you a:
0.8.1 - 8921 (which just equals nightly 8921)
To download the latest stable version, please use the links in an older news-post. I already sent a PM to
Flosoft to get rid of this problem.