My I Mac has a probilem i think was causes by button mgr

I am trying to remove error insecure start up caused by MxBtDaemon in my systems folder. it is preventing me from installing software for my Epson Artison 800 printer. I think it was installed for an old WD external drive I no longer have. I have tried to remove it myself but computer said I dont have authotity to remove. Can you help me? 

Get an application to remove unwanted software

there are plenty of options, just Google it