XLT files are not actually XLS. These are Excel template files, and when you open them, the program opens their copies, where you can make edits. To turn an XLT file into a standard Microsoft Excel 2010 or 2013 spreadsheet, you need to export XLT to XLSX format. Total Excel Converter does this task automatically.
To perform such data export inside the program, you need to specify the sources, XLT files, you wish to convert. Fortunately, this is a batch XLT converter that can handle the conversion of as many files, as you have, at once. In standard configuration the program converts each XLT file from batch into a separate XLSX file. This way you get the same number of files, but in XLSX format. If you need, you can merge all XLT templates into one XLSX.

You will find the following options inside Total Excel Converter:
Adjustable paper properties;
Ability to add pagination and date;
Ability to set file name template for batch conversion;
Running XLT XLSX converter from the command line;
Reading files inside the program.
The initial step of conversion is selecting XLT files for conversion. You can select the whole folder as a source, and the program will convert all Excel files stored inside. The second step is format selection, and it is followed by making conversion settings and enabling conversion. You can also convert XLT to XLSX in batch from the command line, using a text command or a bat file with specified parameters. The program is able to generate a bat file with selected settings automatically.
Using Total Excel Converter you can easily print XLS to XLSX in batches and adjust the look of XLSX copies. The program is also a handy file viewer for all Excel formats. Download the demo version of the converter that is available for free.