They legally have to give you that refund since its bought online, but that doesn’t mean that getting said refund is easy. It could be, but finding that out requires you to buy it first.

This isn’t meant as an attack against this software specifically, but more as a broad statement.

Most people that know what Kelvin is also know that is the same scale as Celsius, but that doesn’t mean its equally is convenient in everyday use.

The single best thing about the Celsius scale (and pretty mich the only thing that makes it better than Fahrenheit except of familiarity) is that 0°C is placed at the most impactful Temperature point for normal people.