crash on startup after aborted iCloud import

Hello. I reinstalled macOS on my laptop and was setting up a fresh install of MailMate. I launched it, got a prompt about importing my iCloud email account, which I selected, but then it prompted me for my email password. I presumed I had to set up some sort of app-specific password in iCloud first so I hit cancel, then MailMate closed itself. Now every time I launch it it immediate crashes.

Running from Terminal:

% /Applications/MailMate.app/Contents/MacOS/MailMate
stat failed: Too many levels of symbolic links
Filename: '/Users/dave/Library/Application Support/MailMate/Messages/IMAP/<my_local-part>@p13-imap.mail.me.com/State.plist_backup'
zsh: abort      /Applications/MailMate.app/Contents/MacOS/MailMate
%

Looks like a dir somehow ended up linking to itself:

% ls -l '/Users/dave/Library/Application Support/MailMate/'
total 40
-rw-------  1 dave  staff   152 May 21 17:14 Identities.plist
-rw-------  1 dave  staff  5731 May 21 17:14 Mailboxes.plist
drwx------  3 dave  staff    96 Apr  6 08:43 Managed
lrwx------  1 dave  staff    16 Apr  6 09:12 Messages -> Messages.noindex
lrwx------  1 dave  staff    16 Apr  6 09:11 Messages.noindex -> Messages.noindex
-rw-------  1 dave  staff   405 May 21 17:14 Sources.plist
-rw-------  1 dave  staff    79 May 21 17:14 Submission.plist
%

macOS 10.15.4
MailMate 1.13.1 (according to the Apple problem report pop-up)

Thanks.