Android
Data files can be found here ..\Internal shared storage\Android\data\com.efmer.boinctasks_m\files
computers.xml is compatible with BoincTasks clasic and BoincTasks JS.
Settings are stored in .json files.
Debug Logging
To enable extra logging click on 
and select BoincTasks settings and check Enable debug mode.
Extra information is added to the Show log logging.
Errors are catched and show in the Show error log.