OK, yes the steps described in that post should help you with insufficient sensitivity, although please keep the downside in mind — if you increase the sensitivity you will also have more incidental noises triggering recognition (chirping birds, etc). Sometimes sensitivity issues are related to doing testing in a single environment and if you optimize for increasing or decreasing sensitivity based on one environment you will see a decline in performance on the other end of the spectrum (developers usually like to work in quiet environments but users like to do speech recognition in noisy ones). Just wanted to mention that issue in advance.
When you make a change to the framework, you need to clean and build the framework project (OpenEars.xcodeproj). Then the new framework should be picked up in your app the next time you build and clean. You can test this by selecting the framework file in your app project and selecting “view in finder” and then when it takes you to the finder file, do “get info” and see if its last modified date is the time that you built the framework project.