Re: md5sums
When checking the md5sums for the installation file (winscp230setup.exe) and the executable (WinSCP2.exe) which is installed by the installation file, the md5sum matches what you have on your website for the installation file but NOT for WinSCP2.exe. Since the installation file matches, I am inclined to trust what it creates, but it is disconcerting to have a checksum failure on a security program.
The MD5 sum for WinSCP2.exe refers to separately downloadable executable, not to the file installed by installation file. Separately downloadable file is compressed by runtime compression (UPX), while the installed file is not (because installation file is already compressed).