Has any one experienced the following problem?

Using the upgrade wizard, I flashed my N810 with OS 4.2008.36-5 (unfortunately, without first backing up my device). Apparently, this upgrade reinstalls the map application (the free basic map reading application, not the premium Wayfinder navigation application), but with only a 7-day trial license. So, now I can't use the map application any more.

What's the solution?