Keeping old settings with FF 12.0

I just successfully installed and activated FF 12.0 but I didn't install it in the default directory (where FF 11 is located) because my C: drive is pretty full. So I installed it on my D: drive instead. I assume now that this was a mistake and that I should de-install FF12.0 from my D: drive and re-install it on my C: drive. Before I do that, however, I wanted to get some confirmation that I should.

The problem is that in FF 12.0 on my D: drive all my favorites are gone and all the filters I have downloaded in the past aren't listed.

So I guess I have to install in the same place my previous version of FF is, right?

I guess I didn't explain well enough. When I load FF11 I of course still have access to all my favorites which I have downloaded.

I have been installing every new version of FF since 2011, and if I am not mistaken, whenever I have installed a new version the setup program has asked me if I want to keep my settings and filters fr om the previous version and delete the previous version. In practice this means that when I downloaded all my favorite filters in FF10, I didn't have to download them again when I installed FF11.

When I installed FF12 (release 12.004, not the beta) on a different drive, the setup program did not ask me if I wanted to keep my previous settings from FF11. The sections "Custom Filters" and "Favorites" are empty in the newly installed FF12. I only have access to the default filters that are included with the product.

My question was, if I uninstall FF12 from my D: drive and re-install it on my C: drive (wh ere FF11 resides), will the setup program recognize that I have a previous version installed and give me access to all my previously (in previous versions of FF) downloaded filters in FF12?

Thanks, that worked!