Latest Version 4.8.7 is released on July 17, 2024.
Release Notes

If lyrics are not output, do the following:
Style setting > Note > Lyrics Position > Offset (Time Direction) (Set this value to a small value.)


For Windows, download from below.
MuseScore 3 compliant.
JapoScore Version 4.8.7 for Windows (27593 ダウンロード)


For Mac OSX, download from below.
MuseScore 3 compliant.
JapoScore Version 4.8.7 for Mac (15535 ダウンロード)

For Mac OSX (macOS 10.13.6), download from below. JapoScoreV3.9.12 and later versions cannot run on macOS 10.13.6 (Sorry!)。

JapoScore Version 3.9.11 for Mac (for OS 10.13.6) (10159 ダウンロード)