YahooMail Not Working

I was forced to download BrowserPlus when I was trying to upload some pictures to email. As soon as I tried to attach the jpeg, Safari kicked me out and shut down. I tried several times to launch Safari--Yahoo--Mail and create a message....As soon as I try to type a letter, again it kicks me out and the browser closes. I get an error message that BriwserPlus is interfering with Safari.

Please help, or instruct me how to remove this program from Mac OS X.

Thanks

Jim