While V1.6 SP2 is excellent, be aware of alternatives:
Navigate to the "Software and Firmware" section under the Modicon M221 product page. Somachine Basic V1.6 Sp2 Free Download
You can access the latest free version of this software directly from Schneider Electric Current Software Name EcoStruxure Machine Expert - Basic (formerly SoMachine Basic). License Type : Free license. Official Support : For documentation or software replacement, visit the Schneider Electric Support FAQ Key Features of V1.6 SP2 While V1
You may need to create a free "mySchneider" account to access the download link. While V1.6 SP2 is excellent