The Warcraft default was originally on key release.
A few years ago, they added the Keyboard API functions which let us use: on press or on release as separate events.

When you make a change within the Toolkit, you need to export to Inner Space (File Menu), before the changes take effect.
If you're in game, a lot of the time you'll also need to /console Reloadui, for the changes to take effect.
Other than that, you'll need to ensure the IS Boxer (addon) is enabled, which it sounds like it is, otherwise nothing would be working.





Understanding FTL within IS Boxer...
There are three FTL Keys, which are frequently referenced and allow other keys to benefit from FTL.
There are: FTL Follow Me, FTL Assist Me, and FTL Target Me.
The DPS 1 (mapped key), in the FTL Keymap does this.
- Do Mapped Key Action (Target: Current Window) > FTL Assist Me.
- Keystroke Action (Target: All Windows) > Sends warcraft the "1" key.

The FTL Assist Me mapped key, is run from the current window.
So that is the window where the command originates.
The actual mapped key that is called, has (from the target window's point of view) the other windows assist them.

The wizard auto generates the FTL modifiers to use for each slot/character, when it is run.
You can change which modifiers you'd like used, but as long as each toon has a unique set, it doesn't matter which modifiers each uses.
The only time these modifiers come into play are when one of the three FTL mapped keys are used.
So, having Alt set for a toon does not impact in any way your ability to use Alt as a hotkey (Alt + A, for example).





I like to have somewhat differing configurations for my assorted teams.

As in, pressing "5" might be a "Send Next Click" action for my Druids (Force of Nature).
But it might be the default FTL Assist Me > Send "5" to all windows, for most of my other teams.
And for another team, it could be a round-robin effect.

If I were to change the default FTL DPS mapped key, the software wouldn't know which application I want.

However, if you click on your Character Set name, under Character Sets (top left window, in the Toolkit), then reference the bottom left window.
Notice Key Maps, which by default shows Control, General and FTL DPS keymaps.

I've taken the wizard generated FTL DPS Keys (Keymap) and copied it for each of my teams.
Then renamed that copied Key Map, after the name of the character set.
Going back to the lower left pane, under Key Maps...
Drag your newly created Key Map (from the top left pane) onto the word: Key Maps (bottom left pane).
Now you should see four Key Maps that apply to this team.
Right click (bottom left pane) on the FTL DPS Keys (Key Map) and delete it from this team; that way you don't have conflicts where the hotkey "1" tries to do two things, once for each Key Map.

If you left click on Key Maps, again in the bottom left pane, on the bottom right pane it shows a list of all your Key Maps.
I really like the "White List" option, and then check (so its highlighted in Blue) only Control + General + The_Team_Specific_Keymap.
That tells IS Boxer, no other Key Maps will ever apply to this team.
Which is important, for our last step.

In the Control Keymap (left click on Control, in the top left pane), you can see the various mapped keys in the bottom left pane.
One is called Activate Maps.
Clicking the "plus" sign expands the mapped key.
We see that there are two steps.
(Steps are subsequent different things that happen, on iterative presses of the same key).
Clicking the first step (bottom left pane), we see that several Key Maps are enabled for (Target: All).
I like to add, Actions (Right Click) > Key Map Actions > Key Map State Action > (Target: The desired character set) Their_Key_Map to "On".
And on step two, to do the reverse.
Once you have an action there (on or off), its often easier to copy/paste and then edit the mapped key for the desired effect.

The Control Key Map, is always on and never gets turned off.
Only put things here, that you always want access to (generally nothing with a hotkey, as a hotkey here cannot be disabled -- so it might interfere with chatting or entering your log in password).
Unless you add the team specific Key Map (in the above paragraph) to the Key Map toggle, it will remain on always.





In my signature is a guide to IS Boxer.
I recommend taking a look at the Key Map section.

A lot of the mapped keys are now generated by the wizard, so are unnecessary to add to your configuration.

Still, the first example assumes you know next to nothing.
And they slowly build on what the previous stuff has shown.
Even if you don't implement much of those Mapped Keys into your personal set up...
The process of interacting with the Toolkit, will build a "working knowledge" on how the Toolkit works.