The path is probably something like this:
<old drive letter>:\Documents and Settings\<user name>\Application Data\Filter Forge\My Filters
You mentioned that you upgraded. In that case the filters will be at the same place but in a windows.old folder on the root of your system drive.
I guess it's fine to just copy them to your v2 folder. That is located something like this:
<system>:\Users\<user name>\AppData\Roaming\Filter Forge 2\My Filters
Can't help with #2 because I don't know what you mean by the cd.
Good luck.
@ronviers