The licensed software removes the following restrictions found in the demo version:

Are you having trouble with a or did you not receive your key via email yet? TCP Client Manual 8 | Simply Modbus Software

Newer versions (like 7.1.2 or 8.x) will typically detect an existing license if it is already installed on your PC.

: Unlike some competitors who use hardware dongles, Simply Modbus is typically software-licensed to a specific PC. If you need to move the license, you should contact the developer directly.

: The program bypasses the "Loading Demo" startup window and goes straight to the main Read window. Unlimited Communication

Last updated: October 2025 — Guide verified for Simply Modbus TCP Client versions 8.x and 9.x.

Ensure you are using the correct client version for your key (e.g., a version 8.x key for the version 8.x software). If you'd like, I can help you: Verify which version of the software you currently have. Provide the latest download link from the official site. Explain how to transfer a license to a new computer. Let me know which version number you are currently running! Purchase Software - Simply Modbus