Event reminders quit working

My event reminders (some, not all) have stopped working suddenly and for no apparent reason.  It seems to be happening in local calendars and the (one) Google calendar.  Is there anything I can do to get them working again?  eM Client 6.0.20154.0.  Windows 7. 

Hi Steve, can you please update your application to the latest version of eM Client (http://www.emclient.com/dist/v6.0.20617/setup.msi), install the update and let me know if the issue persists.

Thank you, hope this helps,