I've taken the time to do a factory reset of my J1 and patiently update it back to 2.1.1.26.
Via Storeman, I can install some things, but not PatchManager 2.0, the error message I get is: File '.core/armv7hl/patch-2.6.1-1.1.3.armv7hl.rpm' not found on medium 'https://releases.jolla.com/releases/2.1.1.26/jolla/armv7hl' This is totally cryptic to me.
And I guess this is the best place to ask for help. Help.