Hello,
This is only possible if you had setup backup. According to the article "Restore deleted app in Qlik Sense, Import app in Qlik Sense" [1], it is stated that "Deleting Qlik Sense application from Qlik Management Console (QMC) is generally an irreversible process", while it is also stated that "If no backups of files are available, no restoration will be possible."
If you have backups present, then you can follow the instructions in the article [1] and hopefully you will be able to resolve your issue.
I hope that this information was helpful. In case I have misunderstood the use case scenario, please elaborate in details by providing additional information. However, if it has helped you resolve the issue, addressed your concerns or at least pointed you in the right direction, please mark it as Accepted Solution to give further visibility to other community members.
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[1] https://community.qlik.com/t5/Knowledge/Restore-deleted-app-in-Qlik-Sense-Import-app-in-Qlik-Sense/t...
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