Had the same problem.
After having a chat with the support of EWallet (really fast nice guys) the provided the following solution:
Be sure to Completely close eWallet on the Mac. Once eWallet is completely closed, open Finder, then use the Go menu and select "Go to folder..." and type in this path (including the ~ (tilde) character):
Yes, this is a temporary workaround while we investigate.
While this "solution" will work for many users, for some it may not work, or may only resolve the problem temporary. We are trying to get to the root of the issue, so we have been collecting crash reports, and having users test various scenarios to give us more information.
If you are having a problem, and this is not working for you, please do contact us! Although we don't actually use chat, you can reach us here:
Thanks for the replies, nice to see Illumsoftware are on the ball
Ive tried the method above and its now working, it did crash again on the first attempt, but all seems ok now. Fortunately I also have the app on my iPhone so I could still access my details.
Instructions like the ones in this thread are great while they work, but can quickly become obsolete. Please contact our Support if you are having trouble using eWallet!
**While you fill out the information in the form, we suggest relevant articles in our knowledgebase for you so you can have an instant answer, if one is available.**