Transmission data folder


I try to install my Roland MIDI devices (XV-5080, XV-5050, D-50, JV-1080, JV-2080 and many many more - that’s why I care future uses…). Sometimes I create a wrong SysEx on transmission part. So I delete the parameter and create a new one. But the old SysEx still remains on the transmission dropdown menu. It makes sense, because I use proper names for data for some future uses. So I want to delete them, but I can not figure out how to. Anybody knows? I use Cubase 8Pro. Thank you.

Is it a stupid question or nobody knows/cares about it?