FF2 stole my Button!

Ok, so I've tried the FF2 beta, but I'm sticking with FF1, how do I get the 'Open this filter in Filter Forge' button back to opening in FF1?

My first thought was I should reinstall FF1, but the link's gone from the download page!

Thanks, I dunno if that solution worked, because I already guessed the url for the filter forge 1 setup file to be http://www.filterforge.com/download/Filter Forge Setup.exe and typed it straight in the address bar, and it worked after I reinstalled it.

I've found a new and slightly more worrying problem now though, some old filters have just been updated to 2.0, on the pages for them the button says

"To open this filter, you should have Filter Forge 2.0 or higher installed on your computer. You can open this filter under Filter Forge 1.0 (this will load an older revision of this filter), but the results may differ from the examples shown on this page.".

However, when I open them with 1.20, it gives me the error saying you need a newer version of filter forge to open this filter. If I click on a filter that I have already downloaded, it works fine and just brings up the version I already have, but ones I've not used in 1.20 before, it just tells me it's not up to date. I don't know if this is because I had the beta installed before and it's messed something up, or if it's broken for everyone using 1.20.