Your LPC does not crash at my machine (LPC V1.5.7 and Win7E). I have some issues with LDPC crashing occasionally as well. Usually I then open the file again and straight ahead export it again, then it works. I never had files that crashed twice, respectivley files I could not export. The may crash indeed multiple times, but onyl if I load them, edit them and export them. Loading and straight exporting works till now always.
Regarding templates for LDPC see this post which describes the handling (for a more complicated shape)
Regarding templates for LDPC see this post which describes the handling (for a more complicated shape)