Our products rely on the underlying operating system to compare file times (as opposed to the display of it). There are no built-in or fixed time requirements for the normal operation of our software. To the best of our knowledge, our products will behave exactly the same as they would have if the DST start and end dates did not change.
Any scheduled operations that are set to run during the hour change may not run; however, this behavior, again, reflects what would have happened had there been no DST change.
PeerSync will synchronize the file is when the file date or time changes, so unless DST causes the operating system to change the date/time stamp of the file (as opposed to the display of it), we would not expect an issue.