Seems like a ridiculously long wait for fundamental functionality.
From the Overview:
PowerStore is a complete pre-built eCommerce website. In other words, we've built the entire store for you allowing anyone to set up and start an eCommerce website without coding or database experience. Simply upload to your server and run the Installation Wizard - you'll be selling online in no time at all.
To bury the currency limitation in the FAQ is an odd decision.
I didn't have too much trouble making the conversion to GBP (here) but it is a bit time consuming to make the alterations.
If anyone wants a PDF of the lines that need changing, then mail me and I will send it.