This Agreement sets forth the entire and final agreement and understanding of the parties and contain all of the agreements made between the parties with respect to the subject matter hereof. This Agreement supersedes any and all other agreements, either oral or in writing, between the parties hereto, with respect to the subject matter hereof, including the Existing Agreement; provided, however, that the Change in Control Agreement shall remain in effect as modified hereby. No change or modification of this Agreement shall be valid unless in writing and signed by the Employer and the Executive.