Now "About" tells me the update installed ok despite not deleting folder.
Swell, only new version looks like old version- still based on same old (9 month old!) Chromium 88, far behind the newest version, 94.
Bit dismaying and confusing, that. Can you explain?
Ungrateful bastard

PS: while i'm here, just wanted to say that while i like SJ's mass downloader, and small speed edge, Firefox's customizability (for instance: text and background color picker) is a big deal to me. Making SJ greener would also help (e.g. suspending old tabs to cut ram/cpu use).