Just use it on the command line

blp0to1.exe <ROC beta blp>

A Roc beta blp requires multiple files so it would be like:
BTNAbomination.blp
BTNAbomination.b00
BTNAbomination.b01
BTNAbomination.b02
BTNAbomination.b03
BTNAbomination.b04
(and many more)

you just pass BTNAbomination.blp as argument. The other files should just be in the same folder and with the same name (different extensions)

You can use MSDOS' for command to do batch files, I will not explain its syntax