Wow! Now there's a new one.
The first thing I would try is to use the allen wrench to try and back it out. Considering the design of the thing, this may work, since it should tend to hold together.
If your luck is like mine though, you will have to remove the clutch release cover. This will require removal of some exhaust components, then the cover. Once it is off, you should be able to carefully turn out the dipstick from the inside out.
If you have to do this, this would be a great timme to install the reduced effort clutch kit.
Also, since it sounds like you just replaced the fluids, get a nice clean tupperware container to store your fluid in, since it's easier to drain the fluid from the transmission to remove the release cover (although you can do the job with the bike on the side stand, and lose very little). When I've installed the kits, I've always replaced the clutch release cover gasket, since it is cheap, and tends to hang up on the oil slinger, and get damaged upon removal. I've re-used the primary gasket, since it is $30.00, and tends to stay either on the motor or on the cover, in one nice piece when the cover is removed.
Finally, I know the dipstick has a torque value in the manual, but all it needs is just enough to snug it down.
Harris