Probably the same method you used to slow the song down can be used to set the tempo back again: Click on Bar 1 and press function key <F5> then set the tempo to 90.

To stop the repeat, see the second and third screen captures below (depending on the screen layout you use):

Attached Files (Click to download or enlarge) (Only available when you are logged in)
2020-12-31_11-02-07.jpg (45.5 KB, 69 downloads)
2020-12-27_13-34-19.jpg (66.37 KB, 69 downloads)
2020-12-27_13-38-43.jpg (90.68 KB, 69 downloads)

BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones