Open data dictionary saved with R2015a in R2014a again

Hello, our project is working with Matlab R2014a. When I was evaluating R2015a for further use in our project I accidentally saved the data dictionary with R2015a and now I'm not able to open it with R2014a again. How can I get this data dictionary running in R2014a again? Thanks a lot.

[Carl-Jakob Ulmer]

Additional info: I already tried the export and import function, which in principal works but unfortunately it's not working with enumeration. They are imported as "Matlab Variable" instead of "Simulink Enumerated Type".