Ziva VFX writes a log file that can be consulted for additional information should Maya crash. The log file’s location is printed in the Maya script editor as soon as the plugin is loaded, so look there to learn where your log files are going. On Windows, a typical log filepath is:
C:\Users\JohnSmith\AppData\Local\Temp\ziva-maya-log-1f52-836a-6dfe-8bc1.txt
On Linux, a typical log filepath is:
/usr/tmp/ziva-maya-log-660b-29e4-b27b-414d.txt