Please try it and let us know, because if my memory don't fail all versions 1.3.4.0 are not 100 % capables to edit UEFI entries.
So far last known version working fine to edit UEFI entries is v1.3.3.2 (2015-02-16)
EDIT: By the way, some time ago I read somewere (in a chinese forum) I don't remember, a message from Pauly (the author) commenting he lost the source files but he was going to start from scratch a new version, which so far I haven't seen any news about it.
alacran