Complex sentence: In September of 2012, Mindjet combined its existing products, including MindManager, Mindjet Connect, and its mobile apps, into a single product named Mindjet and changed from a purchase-based model to a subscription-based model.
Split into simpler sentences: In September of 2012, Mindjet incorporated the functionality of its existing products, including MindManager, Mindjet Connect, and its mobile apps, into a single product named Mindjet. At the same time, Mindjet also changed from a purchase-based model for their software to a subscription-based model.