Umm.. maybe. I'd have to look into it a bit and find the time as well.
As far as running smoother goes, I've had many people tell me it runs smoother than Pikatimer, which is what I was going for. I've never used Emloop, and most people wont because they can't read it. Any limitations it has vs. Emloop is most likely the language it's written in. Java isn't the fastest language in existence. Also, the manual input you mention is something I was thinking about but if it gets included at all, it's a low priority. You can already add and subtract minutes and update delays which is basically what you'd use manual inputs for. Unless you have times already written down, in which case it would be just as easy to write down the targets.
Sorry that it's not running better on your computer. Unfortunately, there's nothing I can do about that particular problem.