Old HTML files release_notes*.html, credits*.html, and about*.html will be deleted by Windows installers.
Previously the installer did not remove old files before installing new files.
As a result, obsolete release notes were displayed for non-English languages.
Version number in Windows oscar.exe has first three numbers same as string and fourth as 0
Version number in Windows installer has first three numbers same as string and fourth indicates build type:
0 = release, 100=alpha, 200=beta, 300=gamma, 400=rc
