HTC Dash / S620 / S621 (Excalibur)

I installed a program on the phone that has changed the fonts which I am not too happy with. I looked every where withing the phone the option to change it but no luck. Any help...

Also, even though I have uninstalled the program, the font wont change and I keep getting the Notification Error.

Everything otherwise is great, I am loving the phone.

Thanks in advance.