You need to take three steps:
1. Add .. to the Include/Module Search Directories
2. Add .. to the Library Search Directories
3. Add the compiler flags.
First, open Project Options in Simply Fortran (from the Project menu). Next, select the category "File Locations" in the Options window. In the text box at the bottom next to the Browse button, you can actually just enter .. and click "Add." Once done, switch to the Libraries tab in that same options category and repeat.
Finally, select the "Compiler Flags" category. In the Linker box, add:
and click the Ok button. Save the project to the directory where your source file is (via "Save Project" in the Project menu). Now you should be able to build everything.
Jeff Armstrong
Approximatrix, LLC