you don’t have to save any files. it should all be automatic. but if you want to be safe you can save off the file deerdays.xml and cal.xml to another location then after reinstallation you can replace the files if for some reason it doesn’t work. You shouldn’t get any activation error either (but I  added an extra activation to your account just in case).

your purchased year includes 8/1/2007 to 8/1/2008. If you try to view the calculation outsidte of this date range it will give you this dialog box. This is by design and isn’t considered a bug. If however you cannot view the claculation inside that date range then it is most definately a bug.

Please verify that your not trying to view outside that date range. If your getting this problem inside the bounds of this date range please uninstall and reinstall the program. If the problem continues please get back with us.

Any previous month/year to current month, that I select and then click Deer Days Calculator I get a dialogue box stating

You have reached the end of the year purchased

When I click OK it displays Registration box with my Name, User and Password filled in, but gray out.  Activation key is filled out, but in blue so it could be changed.