After upgraded to v10.15 Catalina, NJStar Chinese/Japanese WP for Mac will not work. In fact, all the Wine based Apps on MacOS v10.15 will not work
There is a major change in MacOS v10.15 Catalina that it removes the support for all 32 bit apps. This situation can not be solved until upstream Wine developers has found a solution in the future.
Currently, in order to to use NJStar WP, one can only
1. Downgrade MacOS to previous version (v10.14), or
2. Use Windows 10.