Some users have reported issues with SigmaPipe V2.3 resulting from the project file extension change from ".txt" to ".sig". The idea is that the new ".sig" extension will allow Windows to associate such a project file with SigmaPipe. Double-clicking on it will then automatically start the SigmaPipe application.
It seems that, first time round, some users experience a problem and need to resort to "Getting Out of Trouble" (Training Module 2, slide 48). If this happens, it will be a once-off situation and your system should be OK after that.
Some of you have noted there have been several updates over the past 2 weeks or so (not just the main one for V2.3). This has been necessary to iron out a few remaining issues - your patience is much appreciated.