I am using the latest version of ZenPhoto, I did an upgrade from 1.4.0, the issue that I have is that after uploading any images to one of my albums, the album became unpublished, when is already published. Even after I published it, the images does not show up because of permission issues. When I was using 1.4.0 I did not have these problems before. Any idea in how to fix it? Thanks.

1) publish state: Zenphoto should not unpublish an album that is already published unless you do that. The default status of images and albums if uploaded via FTP is unpublished as you might want to set a title etc. before publishing. This is however an option. (You did not say how you uploaded).
There is also a plugin publishContent you can download from the extensions section to mass publish items.

2) Setup tries to set the proper permissions. On some servers it is not allowed to do so you need to do that manually via your FTP client. Pleasae see the troubleshooting guide on our site on what permissions to set.

We uploaded the images thru ZenPhoto Upload feature via HTTP. How do I install the plugin? I tried to upload the folder PublishContent to plugin, but I dont see any option in zenphoto. Could you please guide me step by step how to do these things? Thank you.

About the album that is already been published, don't know why but I did not unpublished. it did by themselve. Everytime my girlfriend try to upload images, I see it by myself. What could cause this?

You install the plugin by dropping the content into the plugins folder (the file and the folder of the same name, not the whole folder).

I have no idea about this. What is the setting of the publish state setting? Try resaving that option. (The upload form provides also a checkbox, check that please).