Importing pst file to EM Client and crash

I have tried several times to import Outlook pst file into EM Client without success. Each time I get an error stating " An error has occurred in the application that prevents it from continuing…" The program then shuts down. I am using EM Client version  7.1.30437.0 which is the latest.  Other than this issue it seems to be a nice program. Any help is appreciated.