I tried to import epochs but it won't allow me to change the epoch times (won't activate the epoch time boxes). Can you help?
Because your events already have a defined time duration (tag "ext" next to the event names). Setting the option "Epoch time" is possible only for simple events, with no duration.
https://neuroimage.usc.edu/brainstorm/Tutorials/EventMarkers#Extended_events
You can convert your extended events to simple events with the process "Events > Convert to simple events" (also available in the Record tab, in the Events menu)
It makes sense, and I was able to convert extended events to simple ones. Thanks Francois!
Sungjin