Normally, it should install just fine, but after it seemed to do so, it asked AGAIN to install version 2.18. Is there a bug in this update? Not suppose to behave like that.
I'm trying to find the updated file to install it MANUALLY, bypassing the problem, unless you can tell me what i should do.
UPDATE: I guess by waiting a couple of minutes after a recently released update or trying a couple of times to "force" for an update, usually solve the issue.
At last it solved itself for me by being stubborn and keep "pushing forward" for an update, so at LAST it updated to 2.18 for AmiUpdate and made a new backup.
Sorry for bothering you, guys and girls
Perhaps this can be provided as a solution or a hint for others who might or have faced this problem?