FitGrid imports the default logo that is on file in your booking platform during the initial data sync. All updates to logos are completed in your booking platform however the new feed over into FitGrid is not automatic.
Once you have updated your logo in your booking platform you must contact FitGrid Support either via chat or email at email@example.com and request your new logo to be manually imported from your booking platform. This request will be submitted to the FitGrid developers to be processed and can take several days. Once complete FitGrid Support will notify you.
It is always best to follow your booking platforms guidelines for the logos recommended size and resolution.