Welcome to the ND0 forum!
ND0 is the free three stack lines, two shared folder downloads version of ND1.
As the two are otherwise identical, the place to discuss issues is the ND1 forum, while this forum is for issues truly specific to ND0.
Know that posting in the forums is the best way to communicate issues to me and affect the development of the calculator.
Hoping you enjoy ND0 and this forum,