I got an error when installing the photos module. The module did not show up in my "installed modules" list so I thought it never installed, but it kept showing under the main module tab as _bx_photos. And somehow, I eventually got a "php fatal error ... line 120" message on my homepage.
I was able to finally remove _bx_photos from my modules tab by accessing my dolphin 7 folder on my local hard drive that I downloaded from the website (it was on my desktop) then went to modules/boonex/photos/install/sql and renamed uninstall.sql to install.sql (since there is already an install.sql you have to rename that first before it will let you change uninstall.sql to install.sql)
Then I uploaded the new install.sql to my FTP web directory under modules/boonex/photos/install/sql (which automatically replaced the old one).
After that, I went back to the Admin page/ tools/ modules and clicked on the photos module and installed it. This time it was successful and actually, it uninstalled it for me.
Hope this helps someone.