Product Activation could not write the activation signature - Solved

Just had the error "Product Activation could not write the activation signature" when trying to activate Multiplicity Pro on Windows 7 Ultimate 64-bit.

Thought I'd post what solved it to help anyone who got a similar problem...

I solved it by running Impulse and choosing Re-Activate. It did take the opportunity to complain that my subscription to Object Desktop was expired, but the program was activated anyway (as well it should, since I bought it out of the Object Desktop bundle).

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