If it's a voltage range that is affected:
I would carefully differ one end of this damaged resistor and measure it's value (with another meter). Then solder it back into place again.
With the meter in the known faulty range, connect up a known signal that would be about half scale and note the reading on the meter and the voltage across the resistor.
With the aid of all these measurements we may be able to calculate the correct value of the resistor.
If it has failed either completely open or completely shorted, this won't be possible.
Actually, on re-reading your last post, it sounds like all of your current ranges have stopped working.
If it's a current range, then start with this:
It may be best if you first confirm the correct operation of ALL ranges. This is most easily done by comparing readings with another meter. For voltage readings, take them simultaneously with the meter in parallel. For resistance readings, measure separately. For current measurements, measure simultaneously while the meters are in series. In all voltage and current ranges, start with a much lower value than would be appropriate for the range to ensure that fault has not resulted in a much more sensitive meter!
My suspicions are that you will find that only the current ranges are affected, but are all of them affected, or just some?
Whichever it is, get back to me with your findings.
When testing your meter I recommend you record the range, the expected reading, and the actual reading. The expected reading is the value obtained from another meter. It is vitally important that you note the range being tested! Keep this so you can check that in fixing the meter nothing else has changed.