We encountered a simililar issue in posting SW results to a Wordpress site. Standard 'simple' FTP access was not permitted. However, after some delving, it transpired that it was possible through WinSCP. It was simple enough to set up Sailwave to use this as an application and lo! everything worked, just not quite as seamlessly. Happy to provide details if required.
However, in a different scenario, I post results to my 'convenient' website, but have links to those file locations from a site which uses Wordpress. When we currently try to access those files from the Wordpress created site, it complains about my site being 'not secure' (both Chrome and Opera, at least, whinge). As I understand it, being not secure means that passwords, credit card numbers etc might be purloined. Needless to say, the 'not secure' site is not a commercial site and offers nothing which would require passwords or credit card details, and imho does not have to be 'secure' in this sense. The option is obviously there to implement SSL, but I'm uncomfortabe in spending my Club's money needlessly (it's a genetic thing).
The common factor is Wordpress, but I can't believe that this (basically a front-end) demands the extra levels of security.