.webloc files

I have a research folder of 542 .webloc files that I sent to a client. He has a PC and can’t open them. Is there an export option available in DTPO that can convert the files to some format he can read?

No. But you could use the script “Convert .webloc to .url v1.0” available here:
prism.gatech.edu/~gth681y/scripts/