I am using Excel 2010 and 2013. I would like to add an excel add-in from page http://xlloop.sourceforge.net/ . There is file with name xlloop-0.3.2 and extension Microsoft Excel XLL Add-In. I added this file from menu File -> Options -> Add-Ins -> In combobox Manage i choosed Excel Add-Ins -> Go... -> Browse and I choosed my file. I see the following comunicate:

"C:\...\xlloop-0.3.2.xll" is not a valid add-in.

Thus, I do next attempt. I go from menu File -> Open -> and I choosed my file. I see comunicate:

The file you are trying to open "xlloop-0.3.2.xll", is in a difference format than specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now?

After I clicked Yes I see a lot of signs (something like from chinese :))

My last attempt was double clicked on file. I see:

The file format and extension of "xlloop-0.3.2.xll" don't match. The file could be corrupted or unsafe. Unless you trust its source , don't open it. Do you want open it anyway?

After clicked yes I see something like the second attempt.

I am really very confused because some of my friends have the same version of excel and they don't have these communicates. Do you have any idea where is the problem in my excel? I very need this addin to work with Java. I will very grateful for your help! Thanks in advance!