There practically is no difference between the 5.0.0 mod selector and the 6.0.0 mod selector (besides small updates I made to the program itself). Likewise the mod selector for 6.0.0 will work on 7.0.0, the only thing you need to do is point the mod selector to the unmodified 7.0.0 client and update the mods for the 7.0.0 client you choose the mod selector to operate on.