I guess the new maps for Destinator 7 are hard to find.
But because the invion is a WindowsCE 4.2 device with 480x272 resolution, you can use any Navigation program from this forum.
Google for the file "CeDesktop.exe" and copy it to the root of a new SD-Card.
Rename the file to "ShincoUpdate.exe"
When you switch on the invion you get the WindowsCE Desktop.
You can now doubletap "My Computer" and then doubletap "SDMMC DISK" to open the SD-Card.
You can now launch any software you have copied onto the SD-Card.
In some cases the invion device doesn't release its GPS port.
Google for the file "ReleaseGPS.exe" and copy it to the SD-Card.
Launch ReleaseGPS.exe so other programs can find the GPS.