I sent you reply to my domain host and they responded as follows - looks like I have to find an alternative option for my galleries.

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Thank you for reporting an issue uploading certain files via FTP.

These files are being rejected by ClamAV, the industry-standard anti-virus and anti-malware software that we use on all our FTP and mail servers.

The logs show that they are being rejected with the following diagnosis:

Uploaded by : ashworthphotography.co.uk
Attempted file : /mnt/website/standard/a/s/ashworthphotography.co.uk/web/test-juicebox/jbcore/juicebox.js
Detected as : PUA.Win.Tool.Packed-176

Unfortunately, as these virus signatures are part of the Clam distribution, we will not be removing or modifying them to accomodate any uploads. We will also not whitelist your domain to bypass anti-virus scans, as these are an important part of securing the hosting space.

If you believe that this report is a false-positive, then you need to submit the file being flagged as malware to the vendor, using their online form at https://www.clamav.net/reports/fp

They will then analyse it, and if they agree that it is indeed a false-positive, an exception rule will be created and added to their database for distribution globally.

If this happens, this will be added to our own installation of ClamAV when the next update is run. We run updates multiple times per day so that we are always current with virus signature databases.