Here is a list of all files with brief descriptions:

FEXPCommonExtension.cs
FEXPCommonFunctions.cs
FEXPConsoleManager.cs
FEXPDataGridController.cs
FEXPInputData.cs
FEXPInputFileHandler.cs
FEXPMesh.cs
FEXPNexxMeshReader.cs
FEXPObjFileReader.cs
FEXPProcessMonitorDlg.cs
FEXPProcessMonitorDlg.Designer.cs
FEXPProgress1Dlg.cs
FEXPProgress1Dlg.Designer.cs
FEXPProgress2Dlg.cs
FEXPProgress2Dlg.Designer.cs