the AM pitchshifter from 1.2.2 now loads correctly again
https://github.com/LMMS/lmms/pull/6554
AM pitchshifter compatibility by allejok96 · Pull Request #6554 · LMMS/lmms
Extend the 1.3 upgrade routine to fix #6312 and shorten some of the code in there
LMMS