After the Dutch MCM (MSX Computer Magazine) published a review of Easy, the original author came forward. Turns out he had supplied an early version of the program two years prior to HSH in Germany. HSH however did nothing with it and subsequently went bankrupt. MK Public Domain then seems to have thought they had acquired the rights to distribute Easy from HSH, which the author claims they did not. The version distributed by MK Public Domain was the early version, and in the authors own words "full of bugs". It also requires 256kB of RAM.
The author however made a newer version, version 1.2 available as Public Domain. In addition this version requires just 64kB of RAM.