I just updated to OpenStudio 1.0.0 and when I try to open an existing .osm file which was saved in 1.0.0-pre, I receive this Unhandled Exception message.
"C:\Users\jenkins\git\OpenStudio\src\osversion\VersionTranslator.cpp@612: Unable to retrieve OpenStudio Version 3.0.0-rc1 IDD from the IddFactory.