Well,
I uninstalled everything from toolbox and I cleaned WOFF registry also from toolbox. Then I deleted remained files/folders.
Then i reinstalled to another usb hdd and everything went OK
WOFF UE 4.07 => skinPack => musicPack => 4.17 update => Run => Everything OK!!!
Previously I have used a small usb 3.0 ssd 128 GB which windows shows as MOBILE storage ( and this cannot be changed - I have tried).
Now I used a 500GB usb 3.0 ssd ( I want WOFF to go FAST
)
I'm not sure but If there is something to blame is this "mobile storage" because it seems this was the reason WOFF Installers couldn't find the WOFF install.
Although it's kind of strange because someone could bet that the installers check the registry entries to find the WOFF install folder and the registry pointed to the right path as far as
I can tell from my little registry search.
Anyway, everythings OK now so thank you everyone for your help!
Consider this a warning : DO NOT use a mobile storage for WOFF install folder, flash, hhd or ssd.....