Yes, there is. Actually, I never used the export feature, I simply did a copy-paste from the rc file. I saw in the Option dialog that there are export features also, but I didn't found it either, and I didn't have time to look after it.
I asked on the 
Win32ASM Community messageboard your question, and 
KetilO gave the answer:
In the 
Project->Names dialog the list of resources appear, and push the 
Export button.
I just corrected the above link.