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I purchased DU Meter for $20. I would like to upgrade to TweakMASTER Pro.

TweakMASTER Knowledge Base article KB0065

We can do that for you, however for technical reasons it is available as mail-in payment only.

There should be enough time for you receive your serial number for TweakMASTER Pro before it expires, if not let us know.

You can upgrade to TweakMASTER Pro by sending us order number of your DU Meter purchase and $18 cash/check/money order. See the mailing address and other details on this page

When your payment arrives we'll look you up in out database of registered users and if you are a registered user of TweakMASTER, we'll reissue a serial number for the Pro Version.

As one final option, you can also make payment online using Paypal at www.paypal.com. Make payment to paypal@infinisource.com. You MUST let me know by email if you choose this option.