I just installed Excel2LaTeX in Excel 2010.
I do see it in add-ins. However, I cannot find a way to operate it. That is, there is no change in the ribbon area after the package was installed.
How does one use the package?
After an add-in has been installed, it is available to use, but it has to be activated first. For this, follow these instructions. An abbreviated list of steps are:
Specifically for the Excel2LaTeX add-in for Excel, after downloading it and reaching step 5 above, this is how I installed it on my computer:
Note that any add-in is specific to the location that it is stored in, since the code/macros are stored in a file rather than being "installed" under your traditional "Program Files" folder. So, it would be preferable to put it in a recognizable folder that you can find and access later. That is, avoid putting it in something like
Use this online version instead! No installation necessary.