Hi @outofnormal, sorry to hear about your troubles. Fortunately, you can still link an image to another webpage. Simply click the image in the "Edit Slideshow" admin panel and its options show. First option is for links.
As for resizing, you can enable it in the "Settings" panel. This will resize your images to always fit the slideshow. Otherwise, they are left as-is, and if you use an image that isn't the same dimensions as the slideshow, it won't fit nicely.
It sounds like you might have had the responsive functionality enabled as well. This will enable the slideshow to resize to fit the container it is within, specifically designed for responsive sites and mobile. If you're not interested in using responsive design or supporting mobile resizing, then you can disable this option under the slideshow dimensions.
Again, my sincere apologies for your troubles. I do hope you'll give the update a chance. It does include all of the features of before, and more. Granted, the additional "click" required to display a slides options is not ideal to users of the previous version, but this was the only way we could add the additional options such as image title, alt text, etc.