1) Do I need to uninstall FB 2 prior to installing FB 2.0.1? 
yes, any time you install a new version of an extension, you need to uninstall the previous version.
2) Will installing FB 2.0.1 require updating or altering my current forms?
No, you not need to edit existing forms after installiung the updated version.
3) If I edit the design & layout of my form (using Edit Form/Edit Contents/Edit Design buttons) will that alter the code having to do with emailing the recordset, uploading/inserting file into db? Specifically, I believe what Jason helped in getting tweaked had to do with the order that code appeared on the page, although it was about six months ago so I'm not sure that was all there was to it.
No, edit ing the form design will not effect the code for recordsets, uploading or inserting.
4) Once I upgrade to FB 2.0.1 and install the HTML editor, can I just add HTML editing to my form without overwriting any of the code that emails and uploads/inserts file?
yes, just make sure that the HTML Editor instance is named the same as the element it is replacing.
It is a good idea to make a backup of the working page before editing it.
