Within Paphs, Brachypetalum is a group which is a bit more difficult to grow. They could be ok for a few years, but keeping them going for a long time seems to be a challenge for many people. Within Brachy, P. bellatulum group (P. concolor is another species) seems to be easier (at least to me) than P. niveum group (P. godefroyeae and P. leucochilum is others in this group).
P. niveum group seems to end up in root rots easily, so I use fairly chunky bark based mix. And watering during the winter seems to be pretty difficult (keep it drier than other Paphs). Also, it is good idea to use pretty pure water. Salt accumulation will desiccate and kill the roots (if the soil has higher TDS concentration than root cells, water can move out from roots). So using low-concentration or no fertilizer is probably important for this group.
Here is Dr. Tanaka's info about Brachy culture. It is a bit unconventional, and I'm scared to try his method, but it contains good info.
enPaph's culture
If you have 2 solid roots, and if you can keep RH fairly high (can you keep 70-80%?), it will probably recover.
I personally think that maintaining good growing environment (and don't kill the root) is more important than using rooting hormones. I hope yours will grow well!