adding megafunctions with uppercase names

Apologies if this has already been answered.

I am a complete newb in FPGA.

Been trying to add lpm_mux gate from megafunctions

for a Quartus II 16.1 lite edition on Ubuntu 16.04 (just downloaded the latest) in a bdf form (following "my 1st fpga"...).

Cannot click it to see its ports (only properties).

Now it seems that in some files, lpm_mux is defined as LPM_MUX (uppercase), whereas

the files themselves are in lpm_mux (lowercase).

Manually copying the lowercase files to uppercase files seems to resolve this (e.g., lpm_mux.tdf to LPM_MUX.tdf).

Now surely in Windows, this won't be a problem - but in Linux it is...

What am I missing here?

What have I done wrong?