Any reason you don’t set the header path project wide, e.g. using the gear icon on the top left and enter the search path there so that it applies to all exporters? You should however link to the architecture specific library files (not the header) separately in each exporter. There was a thread a few days ago regarding adding libraries where I wrote a bit more on that topic, maybe the answer given there helps clearing up your issues too… Importing third party libraries in a Juce project