[Windows +] Double boot check
key | Specify the key string to perform the check. If the same key string was specified for this method by another running Kirikiri, false is returned. |
If Kirikiri, which already has the same key string, is running, false is returned, otherwise true is returned.
If another Kirikiri with the same key string is running, false is returned, otherwise true is returned.
It is used to prevent double startup.