A federal judge in Trenton on Monday breathed new life into a law firm’s class-action suit that alleges there was a deliberately placed “time bomb” in its calendaring and billing software.

Reconsidering an earlier ruling, District Judge Freda Wolfson certified a class of software users in Kalow & Springut v. Commence Corp., 07-cv-03442, based on claims under the federal Computer Fraud and Abuse Act.