Do you recall if you tried to edit the original 'default.c39' file (or whatever CE-39 calls its data files) that was created when you started running CE-39? If so, it may not contain the correct band limits for your version of the radio. That would explain why you couldn't find and replace them. Another possibility is that they may be stored in CE-39 rather than in the default.c39 file.
I've never used CE-39, but if it works like CE-49, you need to select the version of the radio you have (e.g. VHF-L, VHF-H, UHF-A/D/F) and save the configuration. The software will then put the correct band limits in the default.c39 file that match your radio.
BTW, my computer saved default.c49 as a 'read only' file, and CE-49 gave me an error message saying that it couldn't overwrite the file with the updated data. If this happens, browse to the folder where the file is saved, right-click the file, click Properties, and un-check the 'read only' box.
One last thing, I found a website (MaxKelley.com
) that has a lot of really useful information on CE-39 and other Vertex Standard software. Some apps can be started with a password that puts them in 'Manufacture Mode' and unlocks the fields that are greyed-out in some of the windows. Be careful, though, these fields are greyed-out for a reason. Changing them can cause a radio to not work properly.