Intel® Fortran Compiler 17.0 Developer Guide and Reference
If you have more than one version of the Intel® Fortran Compiler installed, you can choose which version to be used when building applications. You can also select different versions for different target platforms and the version of the compiler you are using. The target platform you select determines the compiler versions that appear in the Selected drop-down box.
To select the compiler version:
Select Tools > Options > Intel Compilers and Tools > Visual Fortran > Compilers.
Select a compiler from Selected compiler. Click OK.