Enpass does not open any attachments. Text files from 1PW that were in Notes show up fine and are editable. Attachment files from 1PW like images, or pdf's correctly ended up in the Attachments for each entry in Enpass, the files are listed but cannot click on them to view them. When clicking on the three dots to the right, all that comes up is a Save button that saves the file anywhere else, then it can be viewed outside of Enpass, but cannot be opened / viewed within Enpass. See screencap:
Just ran a test adding an attachment file to a new entry in Enpass and it works as expected, that file is viewable within Enpass, when clicking on the three dots, now the attachment has the added "Open" option along with the "Save" option. So it seems that imported attachment files cannot be opened, but newly created ones can. Here's the test screencap:
Thanks.