Just an update, as of Nov 16 Libresprite has reached official v1.0
Available on the official LibreSprite release page
Currently there is no Windows installer, just a choice of 32bit or 64bit versions in a ZIP archive.
Just pick either one and extract the archive into a convenient location.
Also, the Mac version is again available, but only for compiling from source. Instructions are on the
Libresprite Wiki