Need to repost - no category to submit discussion for iBlog

When iBlog post is accessed as HTTPS - there is a security error for the Blog image as called from HTTP. Can you tell me what file/line I need to change so the image is accessed via HTTPS. 

Also still having difficulty with SEO Title (Slug) eg 

SEO Title is saved as Red Rose and URL appears as 

/blog/Red%20Rose

Thanks

any chance of some guidance please. thanks.