Sonar Platinum, 4/2017 version with Lynx Aurora.
 
Settings for my project are 24 bit / 48 Khz, but the sample rate button on my Lynx Aurora was set to 44.1 when I hit the record button.  Sonar used to warn me when about sample rate mismatches on playback but for some reason on one of these updates it stopped doing that.
 
Soooooooo I now have a bunch of audio tracks that were recorded at 44.1 but Sonar thought it was 48.  I unfortunately don't see any sample rate controls for current projects that would allow me to simply re-sample, nor do I see control that would allow an import WITHOUT a sample rate conversion.
 
Any quick help would be appreciated...
 
Tx

SoX should be able to fix the file headers using the command
sox -r 44.1k infile.wav outfile.wav

SONAR normally informs the interface what sample rate to use, but the interface is not obligated to obey, and SONAR does not necessarily have any way of confirming the interface's settings - it depends on the driver. So this sort of thing can happen, unfortunately, at least with some interfaces. My old MOTU could do it, so I got into the habit of checking it before recording. My 2-year-old Focusrite, however, always conforms to the project sample rate and has never been a problem.
 
What you're going to have to do is resample those files outside of SONAR. Fortunately, a tool exists for that purpose. Best of all, there is a free version. Get it here. I see scook has recommended Sox. That works, too.