Hey Peter. Thanks for the note. This duplicate issue (and to a lesser extent the incorrect time issue – which is related) is currently the top priority issue for the item; as we release products on a monthly maintenance cycle, this fix will be included in the next build when it arrives sometime over the next few weeks.
As with any plugin when it first launches (this has only been out a couple months so far), users are going to find issues that we missed…we’ll work our quickest to get those patched as they come in. It seems a potential workaround for this would be to just disable the auto-import and bring in events manually as they’re added using the broader list – relying on the checkboxes to know which had already come in previously. Would that solution not work until an official patch is released?
All that to say…while we’d hate to see you go, if you feel a refund is fair, email me (pro @ tri.be) and we’ll take care of it for you.