Hello,
as a Quick-Fix I added this to the ical.php
Template-File on line 45, which I copied over into my theme-directory:
$summary = str_replace('&\\;','&',$summary);
However, this is just a quick-fix and only for this HTML-Code
I think this should be done in the plugin’s file em_event.php
approx. line 1900 where you apply the formatting for ‘ical’. You could use the php-Function html_entity_decode