I just want to go back to how it /used/ to work

Question

Itunes 7 has been a total bust.
I've lost tv shows that I downloaded when the machine locked up on the 'processing file' stage (that took emails to allow me to enable again). It's taking forever to download 30min shows that used to download quicker than it'd take to watch the previous show (Daily Show and Colbert report) I've got crackly sound, jerky video, all on a machine that used to play the downloads fine.
I use Itunes for the TVshows moreso than the music, but until they get this truly terrible version of Itunes working, I'll e investigating if I can stop the purchase of season passes until it works.
I bought them knowing I can download and play them fine. Mid-season pass, the video's are doubled in size and causeing me problems to the level that I don't think it's worth me using this anymore.
If there was an option on the size of download, then that might be viable. If I could restrict the amount of downloads at one time, that perhaps could help. If it just worked the same way that it used to, then I'd be perfectly happy (as the new front end looks pretty enough, it's the back end of actually PLAYING the content that's broken).
But as it is, I'm having a VERY BAD experience with this Itunes7.
How defeat could be snatched from the jaws of victory like this is beyond belief.
For the reference, there's nothing else running on the machine, it's uptodate with drivers/patches/antivirus disabled. Maybe it's the processor being 1.5Ghz, but my point is that all the downloads USED to work perfectly fine, but now I have no choice and they've broken something that worked. I didn't ask for doubling of sizes and more hardware requirements. (though trying it on another, much faster machine (duo2 2ghz, 2gb ram, still exhibits troublesome behaviour.
So, I've read that there IS a workaround to get back to the old version, but I'm aghast that we need to do fairly techy things just to make our content play. What happened to Apple? Just works? Not even close.
/rant off
(yes, I'm very, very annoyed by this whole incident)

Answer 1

I think my confusion was seeing multiple Old Firefox Data folders within the same folder. You could try this:
Open your ''current'' Firefox profile folder using
Help > Troubleshooting Information > "Show Folder" button
In the address bar of that window, click '''Profiles''' to move up a level to its parent folder. You should see your current profile folder there, and possibly others.
Leaving that window open, switch back to Firefox and Exit
Copy your ''old'' profile folder from your Old Firefox Data folder (possibly the one that ends with .default?) into the normal Profiles folder alongside your current profile.
Click in the address bar of the window showing your Profiles folder, and copy the path.
Start up Firefox's Profile Manager using Start > search box (or Run):
firefox.exe -P
(Any time you want to switch profiles, exit Firefox and return to this dialog. )
Click the Create Profile button, then when you get the option to choose a folder, open that up, paste the Profiles folder location, and select the folder you copied in. After finishing creating your "new" profile, start Firefox in that profile.
Is your old profile restored as you remember it?
Sometimes all this moving around of files can create issues, and if you were having problems before due to your reset, they will be back, but I think this is the fastest way to return to what you had before.