Times displaying incorrectly in Calendar

Using latest EccoPro with EccoExt on Windows 8.1.  A sudden problem has 
shown up today.

To put a new Appointment in the Calendar, I always click somewhere after 
the previous appointment, type in the appointment details and adjust the 
time as needed in the Date Settings dialog box.  No problem.

But today when I start typing the appointment details, an incorrect time 
appears in the date/time column.  When I go to the Date Settings dialog 
box to fix it, the correct start and end times are accepted, but when I 
OK that dialog box, the original incorrect time still appears in the 
date/time column and in the bar beside it.  The incorrect time does not 
appear to be related to existing appointment times and is never just one 
hour as would normally be the case.  When I move to another Day and 
return, the incorrect appointment item has disappeared.    I've tried 
Daily and Weekly views, today and future dates and the same thing always 
happens.  I've also closed and re-opened Ecco but the problem remains.

Any ideas, please?

Lindsay Graham
Canberra, Australia