Cannot validate License

Hi - I validated my License and it said it was valid, now its invalid, here are the details:
Thank you for purchasing FoxyProxy Plus. Here is your license information:

redacted by administrator

Also it seems FoxyProxy is not compatible with Firefox 3.5.4 or 3.5.5, I have 64bit Linux Ubuntu 9.10

Cannot validate License - More

I have tried to re-install the product a few times after uninstalling (all on the same PC)
I assume you must have a counter of some sort as I cannot re_install anymore.

Hi, It does work with

Hi,

It does work with Firefox 3.5.4 and 3.5.5. Please contact support directly: support at leahscape dot com. We will make things right.

Thanks,
Eric