IrScrutinizer is much easier than using the Yamaha IR converter. On the Import tab, select LIRC, | and either enter a file name or just paste in from the clipboard. Here we can just copy and paste
from the above post. Click Import All, and then go to the Export tab, select Text and Pronto Hex, | and click Export Param. remote.
FWIW, if you instead of "Text" select "AnyMote" as export format, it will generate the .amsr file for you directly.