Question: “My Dooster trial just expired today before I could get on a payment plan. I would like to do so.

Will all my projects and tasks still be there because I missed expiration date by a few hours?

What do I do to get signed up?

Answer: Yes your projects and tasks will still be there. You simply need to start paying. Depending on the exact account status you will either see a pop up requesting payment when you try to log in, or, failing that, login to your account and go to account settings

More on that here https://dooster.net/wp/payments-billing/upgrading-downgrading-plan/