What is the ruling on continuing to use the Paltalk program after the free period expires, given the inability to pay the fees, in order to receive religious lessons?

If you downloaded a program for a fee, you must fulfill this commitment, as Allah Almighty says: "O you who have believed, fulfill [all] contracts," and as the Prophet, peace and blessings be upon him, said: "Muslims are bound by their conditions." If you are unable to pay, you may continue to use it, and the amount remains a debt upon you, unless it was stipulated that usage must cease upon non-payment. Using the program for Islamic sciences does not absolve you of this obligation.