Need help importing SSIS packages in SSMS
Quirk or Perk?

Try this. Close SQL Server Management Studio. Then, right-click it's icon and Run as Administrator. Then, try viewing those packages once more.

That being said...

Use DTUTIL

I find DTUTIL the easiest way to import/export packages to and from SQL Servers.

https://technet.microsoft.com/en-us/library/ms162820(v=sql.110).aspx

Example:

Update, the code from this author looks promising for mass-import of packages using DTUTIL though I have not tried it.

https://canserhat.wordpress.com/2012/08/23/export-and-import-all-ssis-packages-in-sql-server-2008/