No, it isn't quite that simple. Look under Edit > Keyboard Shortcuts.
You were told how to deal with that.
You were told how to keep track of preferences to reset which isn't a big deal (expect possibly for you).
The OP's preferences
may or
may not be corrupted.
You missed the post where he was asked to run some tests prior to deleting preferences but even if he does, it's not a big deal to reset them AND,
if the preference ARE corrupted, the ONLY fix is to rebuild them as Adobe clearly shows in the data I provided.
Again, since you're making this far more difficult than it really is: there are ways to save off preferences before corruption. I showed you how. There are ways to jot down the specific settings that you yourself might forget to set (the horror, the horror), but the bottom line is this, if they are corrupted, and that's rather common, then there's only one fix. Delete them.
NOW that you know the facts and it's so awful for you to consider rebuilding preferences from memory or even screen captures, maybe you will consider backing up ALL the various preferences files when Photoshop is running sound so that if they get corrupted, all you have to do is deal with reinstalling that back up. And if you're lucky to be on a Mac running Time Machine, that is easy to do after the fact if you don't follow sound advise and back them up before they may get corrupted.
Now can we move aside from your hijack of this tread and let some of us go back to aiding the OP to see how he can get the clone tool fixed?