Not to Worry to much..
Your doing OK so far..
Use of GetRight is Only a problem, if the File that you downloaded with it will not install due to corruption or an incomplete download..?
zaZA_Setup_en.exe file name was just the way the Ver 8.0 was distributed..
Last question: Can the [zaclient91_user_manual] be useful for users of ZA free?
Yes.. however, the manual may include info on Features not included in the ZA Free version..