EDIT: Freshly updated list up to 2011 models, now includes the E37, E38 & E67, see pdf attachment.
Given the recent problems people have encountered with the 2009 model ECM's and programming with TIS and EFILive to earlier OS's I thought I would create a list of OS numbers that shows what should be ok to upgrade / downgrade to.
Anything marked as a 2009 ECM do not upgrade an old ECM to this OS or don't downgrade the existing 2009 OS to an earlier OS or it will more than likely result in a corrupted ECM due to a change made to the 2009 ECM's.
OS Compatibility Guide.pdf
Cheers,
Ross