5.5.6 seems usable but definitely more unstable than 5.5.5. Until then, I have never had any crashes for years. Computer is running many hours every day. Now with 5.5.6, I have the occasional crash, one every few days. Someties more. Can’t find a cause. I removed many plugs but nothing has changed.
I don’t want to go back to 5.5.5 because I don’t have the time to re-install the whole thing.
I could uninstall the 5.5.6 update but I am not sure it is safe. I don’t know if Windows performs this task properly. It might cause more harm than good.
If you don’t need the 5.5.6 fixes, stay with what you have installed at the moment.