1. Do a "Merge Open" of all your .GPX file. Then "Export by Filename" and select a .gpi output. It will create a .gpi with the filename as categories.

2. Only Circles are fully implemented and working. You can set the angle in EPE. It will also save them in some special GPX statements so you can reload them later. EPE does not write the angles to the .gpi. Here's why: GPI Creator allows you to set and write the angles to the .gpi but no GPS is supporting the angles (as I am told). If you tell me that angles are working, I'll be please to add them in the .gpi.