To be safe, you can pull down your /albums folder to your personal computer via sftp or ftp. Also pull down your /themes folder and your /zp-core/zp-config.php file (so you don't lose track of your mysql login information)
Then reinstall.
Then upload the /albums and /themes folder back where they were. (make sure to look through them to make sure the only files in there are ones that you put in there)
I just said that if you don't not overwrite your already existing albums folder and use the same mysql data (= database login info). Sorry if that was not clear. You could have asked again...
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But for now, if I reinstall, do I lose some pictures?
Then reinstall.
Then upload the /albums and /themes folder back where they were. (make sure to look through them to make sure the only files in there are ones that you put in there)
I'll do your way, I dont know that is too hard that giving clear steps for developers but anyway thanks again.