Nice to see that rpp and rpp-tlc is still in use, but in the meantime I have found better software.
It is called Pickle, it's interface for RPi is quite simple too.
Pickle is really quick in programming and supports nearly all Microchip PIC mcus.
It supports both high voltage and low voltage programming and accepts INHX32 format which is "standard" now.
I preffer high voltage version:
And project's homepage is:
And as an assembler on RPi I use gpasm from gputils (but one in the distribution is quite old), so use newest one from https://gputils.sourceforge.io/ instead of "apt-get" one