Thread:Project:Support desk/Fatal exception of type MWException after upgrade to MW from 1.19 to 1.20/reply (6)

Wow, I have just solved my problem. I found solution here: Thread:Project:Support desk/upgrading from 1.19.2 to 1.20.x Error: invalid magic word 'speciale'/reply (4).

Shortly saying, what I did:
 * 1) downloaded tar-archive with MW 1.20.2 and unpacked it:  ;
 * 2) went to   and ran:  ;
 * 3) ran that:.

At the first attempt I did only 1 and 2 and got Fatal exception. So I quess either the 3 helped me or it's just luck (or Jesus himself blessed me).