How can I open .proc files?

Help. I downloaded BonitaBPMCommunity version 6.2.2 and I created 8 beautiful complex diagrams. But I needed to re-instal my Mac Book Pro, so I copied all my diagrams to .proc files. After my re-instal I downloaded BonitaBPMCommunity version 6.2.2 again and I hoped I could import the .proc files. But it is not possible. What can I do?

Sorry, but I'm not following you.  How did you 'copy' your diagrams to .proc files? 

In Bonita you can export your diagrams to .bos files for later import or can export them as images (.png, .pdf, etc.) or you can export them as BPMN 2.0 files (.bpmn).