Solution .... (hopefully)
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):
~/Library/Containers/com.iliumsoft.eWallet.mac/Data/Library/Preferences/
and click "go". Your Finder will open to the Preferences folder. Inside this Preferences folder, locate the file called:
com.iliumsoft.eWallet.mac.plist
Then please delete the "com.iliumsoft.eWallet.mac.plist" file from your preferences folder.
Start EWallet - it should work
Cheers
Thomas