I bought Pico-8 on version 0.2.4 a while ago but at the time I didn't have an account and I am wanting to update it with version 0.2.5. Now I do have an account but it says I haven't bought anything in the past and now I would have to buy pico-8 again. I didn't have a humble bundle account either I am hoping to find a way to get the new update without rebuying it.

this was asked and answered on discord: sup needs to find the original email with download link, and if not found send a support request to zep.

I found the email and I now have the new update.

congrats and enjoy!