So i tried changing the default currency from USD to SEK (following https://www.zen-cart.com/tutorials/index.php?article=79) . When i did that, I couldn't get the product price to output (in the store and in the admin). I switched back to dollars, and now it just says "dollars" where the price should be, not even "0 dollars".

I tried this as well:
https://www.zen-cart.com/tutorials/index.php?article=96

but that didn't work either. Any ideas what could have gone wrong here?

I'm running Zen Cart 1.3.8a