Opening RAM Elements 13 file with RAM Elements 16

My RAM Elements (13.3.1.124) was recently updated to (16.2.0.88 CONNECT Edition Update 2).  When trying to open my existing files created in RAM Elements 13, I get an error popup box stating there was an error while converting model...please contact technical support.  This happens when trying to open from within RAM Elements.  I have seen an existing discussion of this topic but it provides no resolution for my situation.  I have no other version of the software to try and open and save the file as a newer version. Is there a way around this?