I'm glad to hear that you've been able to resolve your problem. Thank you for letting me know.
As far as I am aware, there are no known security issues within Showkase so there should be no need to use a third-party software package to protect a Showkase site.
Just make sure that you have a strong password for your Showkase admin login and, if you are worried about spambots harvesting information from a 'Contact' page, then edit the 'Contact' page in question, scroll down to the 'Spam Prevention' section and make sure that both the 'Robots noindex' and 'Hide email address' checkboxes are selected (to dissuade search engines from indexing the 'Contact' page and to obfuscate your email address respectively).
I have not used Wordfence myself but there may be a way to make an exception for a certain directory (or directories) which might avoid the need to actually move your Showkase site's files out of Wordfence's way. It might be worth looking into.
Also, I notice that you are currently using Showkase v1.3.5.
You might like to consider upgrading to the latest version (v1.7.3) as v1.3.5 is now over 3 years old and there have been 12 official releases since then (with many bugfixes and new features). Please see the Version History page for details.
Upgrades are free within the same major version number so you can download v1.7.3 using your original download link. (Download links always point towards the latest version rather than the version you purchased.)
You can find full instructions for upgrading a Showkase site on the Upgrading Showkase support page. (Please be sure to make a complete backup of your existing site first, just in case anything goes wrong and you need to reinstate your original files at a later date.)
Incidentally, I notice that you use an 'External fit px' value of '-300' on your Juicebox gallery pages.
This gives the main images in your gallery pages very little room to be displayed on a smallish screen (like a 15" laptop).
A smaller negative value should result in a better visitor experience across different screen sizes.
I hope these notes help.