DU Meter Upgrade Information

Upgrade to DU Meter 9.x from any previous 9.x version

DU Meter 9.x updates are free for anyone who bought a license for DU Meter 9.x. Just download and install a new version on top of your existing one, and all settings will be preserved and your registration information will be recognized.

Upgrade to DU Meter 9.x from any previous major version

DU Meter 9.0 is a major upgrade to DU Meter 8.x. If you obtained DU Meter 8 license in 2025, it will be accepted by DU Meter 9. Otherwise, you need to purchase an upgrade. We are offering discounts to our current customers.

Dear customers! We recommend you download, install and use the program in fully functional trial mode before purchasing it, to be certain that it works well for you and you are satisfied with the new release. Otherwise, you can download and reinstall DU Meter 8.10 on top of 9.0 and your existing license will be preserved. No need to uninstall!

Get your upgrade link, or a free upgrade if eligible

Please enter your user name and serial number exactly as specified in your original purchase confirmation email, and we will send you the free license or your upgrade link, by email.

At least two fields below must match the information in our database of registered users. If you changed your email address since you registered our software, you can specify your new address here only if you write your name and serial number exactly as it's written in the purchase confirmation email.

Please enter your DU Meter or TweakMASTER PRO serial number. Optional if your full name and email match data in our database.

In most cases this automated response system will be the fastest solution for you. If you bought multiple copies of DU Meter, choose the number of licenses at checkout: volume discounts apply to upgrades too. If for some reason your previous order is not found in our database, please contact our sales team and we will look up your order manually. Please supply as much information as possible. Manual lookup can take up to 72 hours.

Common issues