We have a number of users that created a Free plan last year and they, create some forms.
These forms generated more responses than 50 and it appears that Forms Central was able to count the number of total responses.
But, only the first 50 responses are available to be viewed.
Can the other responses be recovered?
Please read the FAQ article Can I collect more than 5,000 responses using a Plus subscription?. Though the main article is about managing a Plus subscription, the steps provided will work the same for a Free account.