There's no right or wrong... tips can be fixed from either side, or a combo of both. For example, here's a couple of Leek fixes to repair a broken tip....
Top is a regular Leek
Middle was fixed from the edge side (BTW you have to work pretty much the whole edge to have a more gradual upsweep)
Bottom fixed from the spine side.
Each has a tip, you just get different results based on what you do. For a bigger break, it sometimes helps to mark it with a Sharpie to see how it will come out.
If you repair from the spine side, you can usually do it quicker, and without effecting the edge, and most of the points pwet made are kept. If you repair edge side, it may take a bit longer to do it right, and you have to resharpen when done. Just about everyone has hit on the pros and cons of both methods... but there's no right or wrong. One thing to keep in mind with some folders is, if you only work the edge and not the spine, you may end up with the tip sticking out above the handle when you close it.
As for the OP... the 350 is coated, plus blunting the tip with the Sharpmaker should be pretty minimal, so a PROPER sharpening or two should restore the tip. Just use the blade and when you resharpen concentrate on the edge approaching the tip, until the tip is re-established. Don't just concentrate grinding at the very tip, or you'll just blunt the nose (it's pretty blunt already on the 350), you need to work the edge up to the tip until its restored.
cbw