C95 update v17 and navionic chart resolution issue

[jeff]

I updated my c95 mfd to version 17 and my navionics chart for the Pacific Northwest and am now unable to view any detail north of my current latitude. Charts for my current position (near Seattle) and south can be viewed with all detail appearing. Attempts to view areas north of my current position result in the plotter zooming in without detail. So, basically it's all blurred and no detail, I.e obstacles, local depths etc.

I went back and got another download of the software update, did the install, did a factory reset and got the latest update on the chart. No improvement. As a side note, auto routing will work to the south where I have detail but not to the north where the chart detail is not available. All this worked fine before the update. Can I go back to my older version of the software, was last updated in Septemebr 2015? How do I get this resolved?