The new Notices tab looks good, with one minor glitch. All notices include the more... hyperlink, even those that don't actually have a link to the project website. Clicking more... on these "one-liner" notices just opens a File Manager window to the stored file:///C:/Users/.../AppData/Roaming/eFMer/BoincTasks/html/notices.html. In BM, only notices with an actual link to the project have the more... hyperlink.
I reverted to the older 6_10_56 code, copied the notices classes etc from 6_13_0 and you got the new code.
But now I still don't know why the code crashed. Maybe I try again when the new stable release is there.
And I got some more suspects, about why BT sometimes crashes when a connection is lost.
The Notices tab is user adaptable, so you can change about everything about it, by changing the template html file.
What happens is that notices.html is made from the template with the notices data.
Next the file is read by a browser that's inside the window.
External links are always executed by the default html browser.
But when you don't have html assigned to a browser, the system may want to open something else.
Try opening the notices.html file file:///C:/Users/.../AppData/Roaming/eFMer/BoincTasks/html/notices.html
and see what happens.