The correct license is GPL3+ according to [0].
[0] http://bazaar.launchpad.net/~openshot.code/openshot/main/view/head:/openshot/openshot.py#L10
Package-Manager: portage-2.2.28
MY_P="${MY_PN}-${PV}"
DESCRIPTION="Free, open-source, non-linear video editor to create and edit videos and movies"
-HOMEPAGE="http://www.openshot.org/ https://launchpad.net/libopenshot"
+HOMEPAGE="http://www.openshot.org/ https://launchpad.net/openshot"
SRC_URI="https://launchpad.net/${PN}/$(get_version_component_range 1-2)/${PV}/+download/${MY_P}.tar.gz"
-LICENSE="GPL-3"
+LICENSE="GPL-3+"
SLOT="1"
KEYWORDS="~amd64 ~x86"
MY_P="${MY_PN}-${PV}"
DESCRIPTION="Free, open-source, non-linear video editor to create and edit videos and movies"
-HOMEPAGE="http://www.openshot.org/ https://launchpad.net/libopenshot"
+HOMEPAGE="http://www.openshot.org/ https://launchpad.net/openshot"
SRC_URI="https://launchpad.net/${PN}/$(get_version_component_range 1-2)/${PV}/+download/${MY_P}.tar.gz"
-LICENSE="GPL-3"
+LICENSE="GPL-3+"
SLOT="1"
KEYWORDS="~amd64 ~x86"