No, the .7z file is a compressed archive of 7-Zip.
The archive "Ace3DS_Plus_Backup_ntrboot_flasher [767F89B8] .7z"
contains the following files:
- ntrboot_flasher (beta) .firm
- ntrboot.log
- backup.bin
The Ace3DS Plus card can be restored with the backup "backup.bin" and the "ntrboot_flasher (beta) .firm".