Revert to the Original Crosshair

Disable the Resource Pack

Open Minecraft and go to Options → Resource Packs. Find the Crosshair CUBE pack in your active list and click the arrow to move it back to the available packs section. This disables it without deleting it.

Confirm the Change

Return to your world or a new game. The crosshair should now be the vanilla plus sign (+) shape instead of the square.

Re-enable When Ready

If you want to use the square crosshair again later, return to Resource Packs and move Crosshair CUBE back to your active list. The change takes effect immediately.

Delete Permanently (Optional)

If you want to remove the pack entirely, go to your resource packs folder on your computer and delete the Crosshair CUBE folder. This frees up space but means you'll need to reinstall it if you change your mind later.

Keep the pack installed but disabled if you think you might use it again — this is the easiest way to switch between crosshair styles.