A lot of factors come into play here. A lot will depend on the hardness of the blade as to what equipment will be required to reprofile the blade edge. If it is anywhere near 60 on the Rockwell C scale, you're not going to be able to do it with a file. Whatever is used like a sander or bench grinder will have to be used slowly so as to not heat the blade material enough to cause the blade to loose it's hardness.
The cost of the knife is also a factor. If you have to take it to someone else to have the work done it's entirely and likely possible that the cost to repair it would be higher than the cost to just replace the knife.