Superfighters Deluxe Beta for the next update (1.4.1) is available on Steam to test for anyone! You can find more information and stay up-to-date about updates to the Beta in our discord! If you want to share some feedback about the Beta you can do it in the sfd-discussion thread in discord too. Thanks Odex for all your work this far!
This is how you join the beta:
Right click Superfighters Deluxe in Steam -> Select Properties -> Go to Betas -> Select beta branch "sfd_v_1_4_0_beta".
To leave the Beta - repeat the above steps but select beta branch "None" instead.