John,
I just updated to the latest XLC v. 3.08 and was attempting to create a forumula from the Add-in menu ribbon common in Excel 2007. I keep receiving an error message that the version I am using is an old version and that it will direct me to the Excel Calc website to download the latest version. This is the latest version.
I read one of the posts on the forum and tried first to uninstall the version that I had on the computer which was successful. I had to download v. 3.08 again and I reinstalled.
I also went through the Excel options to find all add-in's and .com add-in's to make sure that I removed everything that referenced XLC before I reinstalled.
After downloading the latest version again, I installed it and started Excel back up. I found the XLC ribbon in the add-in menu and highlighted a cell to create the formula. I received the same error message:
"Your copy of the ExcelCalcs Add-in is old and you need a new copy. You'll be directed to www.excelcals.com website where you can download a new updated copy for free."

I still can not get it to work. Should I be rebooting my computer before reinstalling (which I will try) so as to unload any DLL files still loaded that can not be overwritten?

Thanks in advance.
Dennis

Dennis the chances are that the old XLC version has not been un-installed and you somehow are starting up version 01_08 which is now expired. To un-install the old version go to the windows start button and select:
All Programs>XLC>un-install XLC

To double check it has been un-installed see that XLC.dll and XLc.xll are removed from the install directory (normally C:\program files\XLC). Download XLC version 03_08 and install.

If this did not work I am perplexed but all the updating process does is replace an old version of XLC.dll with a new version of XLC.dll. The zip file you download for XLC version 03_08 includes the latest copy of XLC.dll so you can always update the old copy with a simple copy paste.

I hope this gets you going again Dennis. Let me know if you have any more troubles.