KeepNote could not load my notebook in KeepNote format (.nbk)

Hello to all, I spent all day reading the documentation and I tried to:

  1. Convert the .deb to pkg but I get architecture error, probably because the .deb is a 32 bits
  2. Then I tried to created an appimage of the official .deb package, but the process failed
    I followed this documentation:
    https://docs.appimage.org/packaging-guide/converting-binary-packages/pkg2appimage.html
  3. The KeepNote site has a noarch.rpm package, ¿is there a way to convert it to Arch package, with an easy procedure?
    http://keepnote.org/download/keepnote-0.7.8-1.noarch.rpm
    Thank you and regards