Does not work with Yosemite

This app used to work great, I loved it! Since switching to Yosemite, Chimport does not open properly and I can no longer select multiple contacts to add to Mailchimp subsclber lists. Very frustrating, Looks like I’m not the only one with this issue. Would greatly appreciate either a fix or a workaround solution so I can love it again! Thank you.

Raquelita pepita about MailChimp Import