Thx.  All it needs is the ability to save xlsx format.   This is not elaborate product enhancement request, it is pure laziness not to do it.  As for the product development team, initially I thought they would take things seriously but afterwards I realised that was yet another area to dump issues and not do anything.  I have a list of such enhancements I sent and nothing happened.  So let us not talk up on that.  You guys have a major app and make enough money to resolve these issues only if you throw resources to it.