Complex sentence: When he left IDG sued him for trademark infringement to prevent him using the name, they settled out of court, IDG paid Cringely's legal costs, and he is allowed to use the name professionally, but not in computer publications.
Split into simpler sentences: When he left, IDG sued him for trademark infringement to prevent him using the name. They settled out of court, IDG paid Cringely's legal costs, and he is now allowed to use the name professionally, but not in computer publications.