Zibo releases for some bugs sometimes "Hot Fixes", which doesn't contain the whole aircraft files, but are small zip files with only the modified files.
For example: for 3.30c (hot fix only) you need install 3.30b and then overwrite files with the 3.30c package.
The installer should be able to update to the latest release and then apply the latest hotfix.
Zibo releases for some bugs sometimes "Hot Fixes", which doesn't contain the whole aircraft files, but are small zip files with only the modified files.
For example: for 3.30c (hot fix only) you need install 3.30b and then overwrite files with the 3.30c package.
The installer should be able to update to the latest release and then apply the latest hotfix.
Source: https://forums.x-plane.org/index.php?/forums/topic/138974-b737-800x-zibo-mod-info-installation-download-links/