Follow the steps here: builds.io/accounts/login/
Please, keep in mind, that:
You need to use Safari browser in non-private mode;
Avoid opening BuildStore links shared in messengers inside the messenger-app (it looks like Safari, but doesn’t give you the full functionality);
Be sure you’re Logging In the same way you’ve Signed Up. If you Signed Up with Facebook, for example, purchased subscription, installed the profile — please log in via same Facebook account too. If you Log in using another social account, our service will automatically create a new BuildStore account connected to it.