HI,
try with this solution:
In the finder menu click and hold on the GO menu.
Hold the option button and the User library menu will show up.
Click the User Library.
In that folder go to preferences and find the adobe folder.
Right click on adobe folder and click get info.
In the Sharing & Permissions section there should be three names. All should say Read & Write next to them.
Unlock the lock, switch them all to read and write. Then click on the little gear directly under the names or to to the left of the lock and in the pulldown click on "apply to enclosed items. Then lock the lock again.
Now go to your OS Hardrive and click on Users, your user name, Documents.
Find the adobe folder there. Right click on adobe folder and click get info. In the Sharing & Permissions section there should be three names. All should say Read & Write next to them.
Unlock the lock, switch them all to read and write. Then click on the little gear directly under the names or to to the left of the lock and in the pulldown click on "apply to enclosed items.
The lock the lock again.
Wait 1 minute.
Then launch Premiere.