for ya info
tried tha app on 4.4
all seemed ok at first but then repeat notofications led to discovering a task error
Locked Task: queue
Error: Cannot unpack array with string keys (0)
#0 /home/html/system/Email/Email.php(481): IPS\_Email::devProcessTemplate('email__newslett...', 'Newsletter Dist...', Array, 'plaintext')
#1 /home/html/system/Email/Email.php(813): IPS\_Email->compileSubject(Object(IPS\Member), Object(IPS\Lang))
#2 /home/html/system/Notification/Notification.php(574): IPS\_Email->mergeAndSend(Array, NULL, NULL, Array, Object(IPS\Lang))
#3 /home/html/system/Notification/Notification.php(555): IPS\_Notification->sendEmails(Array, Array)
#4 /home/html/applications/newsletters/sources/Newsletter/Newsletter.php(995): IPS\_Notification->send()