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)