Shutdown MS Antispyware
Delete or move in another location the gcThreatAuditScanData.gcd and gcThreatAuditThreatData.gcd from MS AS folder.
Open MS Antispyware. It might load slower as it is trying to locate the defs file that you deleted/moved. It will rebuild those 2 files again.
See what defs you have now after doing the above. If it's not 5729, update it again using File>Check Updates instead of using the other link to update the program.
I have tried again to download reinstall and update but still have the problem that the 5729 defintions not being installed and just repeating 5725 to 5729 when I click on check for updates. Has anyone heard any new information as a solution or when MS will have a fix? I do have the 1.0.614 version. Thanks