BUGGY, no alignment option and conflicts with other plugins

Having major issues with this plugin. After wasting days of troubleshooting why certain visual elements on my WordPress site started displaying incorrectly (the colors of various elements all over my pages were all changed to green (hex color #468847) and positioning of other elements were all off), I narrowed the issue down to this plugin. As soon as I disabled WP Visual Slide Box, my website displayed correctly again.

On top of that, I can’t fathom why there isn’t an alignment option (left, center, right) with the many other options available. I can’t for the life of me get my images to display centered on a page or right-aligned. They’re all forced left-aligned for some odd reason.

I tried getting around the alignment issue by placing the shortcode inside of a div tag that was centered, but the plugin simply ignores any div style settings. I also tried containing it within a table (with centered styling applied), but that didn’t work either. Then I tried messing with the float settings and editing the CSS code to no avail. I can’t believe nobody has brought this up before.

Overall, this drives me absolutely bananas why it’s so darn difficult to find a plugin to simply change an image to another image on rollover. All the plugins I’ve found either cost ($20+) and are way overkill for what I’m trying to achieve. Then I found this plugin — and it broke my site!
#FRUSTRATED

EDIT: I narrowed the display issues down to the custom-fun-box.css inside the plugin folder. There’s some problematic code in this file that conflicts with other WordPress plugins and other elements.