invalid key on password reset

Hello all,
I’m using Theme My Login on WordPress 3.7.1. I know that version is not supported by the plugin; however, since I’ve seen many posts about the same issue, I thought perhaps there is an inherent flaw in the plugin that someone might be able to help me with.
As many others have posted before me, when I request a password reset I receive the email with the reset link, but following the link yields the following error “Sorry, that key does not appear to be valid.”
This happens whether I click or copy and paste the link.
Any advice would be appreciated.

http://wordpress.org/plugins/theme-my-login/