I can not access forms that were accessible

There were several forms that I had been approved to keep since I had them prior to the upgrading thing occuring. I went in and I was organizing them and a few I turned off just until i made changes and now i can not turn them back on.  These were already forms that I was told i could keep since I had them so long and they were in place prior to the change. I even tried to delete some. I really just need some for reference or to disply work that I have created even if I dont use them. especially the math libs one. 

Hello,

As I have checked your account, I have seen that you have 16 forms in your account despite being a Free plan. As you said, you are allowed to keep them in your account as they're grandfathered.

However, you are not allowed to enable that forms again as you are a free user. You need to upgrade your account or delete the forms until 5 left in order to make them work again.

Thank you.