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I had a quick look at the installation details for Interlogy and unfortunately, it appears to be incompatible with the Yola sitebuilder, for a number of reasons. The installation requires that you have FTP access to your website, which is something Yola does not offer. It also looks like it installs a database, which is another thing Yola does not offer.
As for alternatives, I am hoping that one of our community members can offer you further suggestions.