The online WeWantToKnow Store allowed you to purchase Windows (<8) and Mac versions of DragonBox Algebra 5+.
As of 2018-10-11, the store and the associated FetchApp service have been closed down.
Customers who wish to re-download their past digital purchase may contact us through our support. ( firstname.lastname@example.org )
Users who wish to have Desktop versions of our products may contact us through our support. ( email@example.com )