I am using v. 18.2 now, and plan to replace it with 18.3 soon. I have assigned most of my macros to key combinations, and it is a major pain in the neck to reassign them whenever I do a clean installation of Mint.
I am glad to learn where LO macros are stored, but now I need to know where hotkey assignments are stored ---or how to back them up and restore them..
I posted an answer to a similar question just 2 weeks ago here (Where are macro key assignments stored? - #2 by librebel), was it insufficient?