Hi Andy,
You should be able to untar the archive, move into the top directory and just do "make install". However... I'm getting an error from tar. I'll try downloading it again, but my copy may be bad (how far did you get?). It should be available elsewhere. You may be better off with Geany, but that asmref is a gem. I'll look into it - remind me, if you need to.
Sorry to be so brief. Usually I enjoy chatting about asm, but I haven't been "in the mood" lately. I hope I'll get back into it, but that "old far* problem" is getting pretty bad for me. You have my sympathy on that.
Best,
Frank