Photos Forever supports the following formats:
* jpg, jpeg, jpe (JPEG)
* bmp (Windows Bitmap)
* jfif, tif, tiff
* pef, ref, raf, dcr, crw, nef, x3f (RAW digital camera formats)
This info can be found in the FAQ
There's really no manual beyond the program's help file and the FAQ. Photos Forever was intended to be just a very simple straightforward backup tool. Thanks for your feedback!