We have no limits on FREE subscription plan use, i.e. you can use it as long as you want.
This plan only has a limited number of templates (no more than two), exports (4 per month), test emails (5 per day) and Timer block views (1000 per month).
All counters are reset next month, on the same day when the plan was activated. For example, you registered on 27/01/20 and spent exports limit in 2 days, therefore new exports will be available on 28/02/20.
You can find a date when you were registered on Stripo in My organization section.
Also if you click on the "Export" button, in the pop-up window you will see how many exports left and when new exports will be available