Thanks for the answers guys, I found out there's quite a few methods but what I did was import the song I wanted to sample into Edison, then went to Format > Edit Properties and put in the actual BPM which I found via the FL tap method (right click FL Project tempo > Tap and tapped to the beat)
Opened a new project, placed the song in the playlist. Changed the project tempo to what I wanted the song to shift to. Because the song now has an embedded tempo, it will shift.
Then when I dragged the song that I wanted to sample back to Slicex it was the tempo I exported it as.
I'm sure there's easier ways out there but i'm just glad I found one way for now