The HP / LF Filters work fine, resonance control allows a more interesting tone shaping, but the big surprise for me was the drive control. Usually - as a guitarist - I often are not too convinced of a lot of not especially for guitar designed gear, which offers digital audio saturation, overdrive or distortion, nevertheless I'm always curious about new gear.
Quite the opposite here. Adjusted properly you can use this plugin as well as a small, easily adjustable and very flexible overdrive replacement or even as an amp-sim replacement, if you are looking for some very well controllable transparent, naturally and harmonically sounding overdrive or distortion tones. I know some overdrive / distortion pedal sims and amp sims, which for me sounded worse than some of the tones, I got out of this small plugin at my first attempts, even without any IR-cabinet or additional other gear. With additional plugins it also works fine.
My experience was, that less often is more, especially when adjusting resonance and drive.
A very good and useful tool for a flexible sound shaping, while maintaining the sonic qualities of tones or even improving them.
I'm not sure what is going on for you, about 1000 other people have managed to sign up and get the plugins without issue. Please use the General Enquiry form on https://bomshankamachin.es/contact to send me a direct message and we can try to fix it for you :).