Default Certificate Retiring?

Hi there — I just got an email from Salesforce saying the default client certificate will be expiring in August 2017. Will this affect the plugin? I can’t say I fully understand the change!

Here’s the help article they sent: https://help.salesforce.com/apex/HTViewSolution?urlname=Default-Certificate-to-Retire-on-August-7-2017&language=en_US&eid=ss-tc

Thanks!