I expect version 1.03 will go on the official site garritan.biz on Friday or Monday, so if you want to be sure you are running the official version make sure you download it from garritan.biz, not from the link here. Meanwhile... you are very welcome to download what will most likely be the version that gets posted on garritan.biz, which is the release candidate version of 1.03 (applicable to all Steinway editions), available from this link as a public beta.
Windows Release Candidate:
Macintosh Release Candidate:
If you have any problems with either the mac or windows update, please let me know!