My web host left me a response:
ImageMagick is already installed on our servers. We run ImageMagick version 6.3.3. We have ImageMagick binaries. The path will vary depending on which ImageMagick binary which you need to use on our platform. The following are the two most common:
/usr/bin/resize
/usr/local/bin/convert
Go to the control panel (CP -> Master Settings -> DB, Paths, & URLs -> Paths & URLs Tab -> ImageMagick Settings) and enter the paths for convert and mogrify as:
/usr/local/bin/convert
/usr/local/bin/mogrify
Then change the settings for the Gallery (CP -> Master Settings -> Gallery Settings) and Registration (CP -> Membership -> Registration Settings) CAPTCHA's to use ImageMagick
Additionally, there is also the reply page setting (CP -> Display Settings -> General -> New Post/Reply Page Settings).