Pegasus Mail & Mercury

Hi, Starting today, Pegasus mail started crashing while trying to open a saved e-mail.  I was running Version 4.52 initially and I downloaded V 4.61 and the problem persisted.   I am running Windows 7 Ultimate x64 ad AVG antivirus.  The C: is an SSD, but Pegasus mail is loaded onto a SATA 6Gb/s hard ...