If nobody needs in popup notifications (I think there is no needed because nobody close them during 2 weeks) you can set "Notifications (priority<)" in Project settings->Event/History tab to 0. In this case there will not be popup notifications, because priority of the event will be greater than this setting. Anyway the event will be collected in the event database and you can check it. Also the reason of freezing could be using SQLLite database. In the big project the file of SQLLite database grows very fast (you can check it in the /DB folder where installed TeslaSCADA2 Runtime). So we recommend other databases (MySQL, PostgreSQL or MsSQL) for big projects or use smaller Storage period (you can setup it it Project settings).
Best regards,
Ruslan