Project prefix on exported files

[GrooverMD]

Hi all. I have a project that has a 3 notes on a 3 tracks. I have named the project as guitar_.flp. I want to export->all playlist tracks wtih each tracks name ( named staccato_1, staccato_2, etc ) to files called guitar_staccato_1.wav, guitar_staccato_2.wav, etc, but FL Studio inserts a - into the exported wav.
e.g. guitar_-staccato_1.wav. How do i stop FLS from inserting the - into the filename.

I don't really want to rename all the samples that I create.