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Installing Tamper Data on 34.0.5 complains with an error saying its not compatible.

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I have a Win7 laptop 1 year old with FF 34.0.5 and Tamper Data 11.0.1 and it works fine. When I try to install the same Tamper on my brand new Win8.1 laptop also with FF 34.0.5 it gives an error of "Tamper Data is incompatible with Firefox 34.0.5". Any thoughts?

Thanks, -Bill

I have a Win7 laptop 1 year old with FF 34.0.5 and Tamper Data 11.0.1 and it works fine. When I try to install the same Tamper on my brand new Win8.1 laptop also with FF 34.0.5 it gives an error of "Tamper Data is incompatible with Firefox 34.0.5". Any thoughts? Thanks, -Bill

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Hello bnoren, any luck if you re-install a new copy from the add-on ?

https://addons.mozilla.org/en-us/firefox/addon/tamper-data/

thank you