I have checked the a"about" page on the Ereader and it is showing as registered.
Save the file somewhere you will remember (for example, to your Windows Desktop).
Drag the epub file you downloaded into the Books tab of the Reader for PC software, and then Sync. of China Hungary India Indonesia Ireland Israel Italy Jamaica Japan Kuwait Latvia Lithuania Luxembourg Macao S.A.R.It includes Nokogiri and CSSPool additions to implement something akin to getComputedStyle in JS (the actual text extraction part doesn't take more than 150 lines, and what remains is the style stuff).
Anguilla Antigua and Barbuda Argentina Aruba Australia Austria Bahamas Bangladesh Barbados Belarus Belgium Bermuda Bolivia Brazil Bulgaria Canada Cayman Islands Chile China Mainland Colombia Costa Rica Croatia Curaçao Cyprus Czech Republic Denmark Dominican Republic Ecuador Egypt El Salvador Estonia Finland France Germany Greece Grenada Guatemala Guyana Haiti Honduras Hong Kong S.A.R. of China Malaysia Mexico Mongolia Montserrat Morocco Nepal Netherlands New Zealand Nicaragua Nigeria Norway Oman Panama Paraguay Peru Philippines Poland Portugal Puerto Rico Qatar Romania Russian Federation Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Saudi Arabia Serbia Singapore Sint Maarten (Dutch part) Slovakia Slovenia South Africa South Korea Spain Sri Lanka Suriname Sweden Switzerland Taiwan Region Thailand Trinidad and Tobago Turkey Turks and Caicos Islands Ukraine United Arab Emirates United Kingdom United States of America Uruguay US Downloads Venezuela Vietnam Virgin Islands, British of China Hungary India Indonesia Ireland Israel Italy Jamaica Japan Kuwait Latvia Lithuania Luxembourg Macao S.A.R.