Lost NAT's...

Hi,

please can anybody help me.
I use RM750 with OS 6.73.1.
After some time of using I find out that I loose all my setting in NAT.
I have some configurations backup, that I tried to restore with these setting, but I don’y see there nothing.
After that, I have upgraded to the latest 6.38 version, but still the same problem.
I don’t know how can I restore these setting, that I will have it there. It will be enough to make a screenshots from these settings that I can manually to add it there again.

Thanks for help.