pkg2appimage: appimagekit-meshmixer.desktop: error: value "2.7" for key "Version" in group "Desktop Entry" is not a known version

When I launch the MeshMixer AppImage on Fedora 25, it asks me the following question:

But nothing happens if i click Yes. I’ve tried in terminal an there’s an error:

/home/churchyard/.local/share/applications/appimagekit-meshmixer.desktop: error: value "2.7" for key "Version" in group "Desktop Entry" is not a known version
Error on file "/tmp/.mount_miK9kd/meshmixer.desktop": Failed to validate the created desktop file

The latest specification says:

Version of the Desktop Entry Specification that the desktop entry conforms with. Entries that confirm with this version of the specification should use 1.1. Note that the version field is not required to be present.

The entire MeshMixer/MeshMixer.AppDir/meshmixer.desktop contents form the machine I created the AppImage:

[Desktop Entry]
Version=2.7
Name=MeshMixer
Name[en_GB]=MeshMixer
GenericName=Mesh processing
GenericName[en_GB]=Mesh processing
Comment=Application for aggregating, fixing and editing meshes, and for preparing them for 3d printers.
Type=Application
Exec=meshmixer.wrapper  %F
Icon=meshmixer
Terminal=false
Categories=Graphics;