No, of course not. Force updating only makes the game redownload the game files in the /bin/ folder. Your game saves aren't in that folder.
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Try clicking options in the log in menu and do "Force Update". If that doesnt work, try going into your files, search "%appdata% and delete your .minecraft folder. Then go to minecraft again and it should re-install all the updates.
The easiest way to delete a Minecraft mod is to force update. When you start Minecraft, where you hit log in below that there is an options button. Click on that and hit Force Update, and it should change to will force! You will have to re-install any mods you would like again as that deletes all mods. If you don't want to do that you can go through your minecraft.jar and delete the mod file by file. Experience: Experienced Minecraft Modder
you can either force update your minecraft via the login page or you can delete the entire bin folder
To fix it, restart minecraft, and in the launcher, click the options button next to the login button and click force update, than try again
If Minecraft hasn't updated for you, you may have to force an update. When Minecraft opens, check the force update option and then log in. That should make Minecraft update for you.