You can find possible solutions
here. For example you can use
OpenOffice application to convert Excel files to CSV with different encoding.
About changing styles, it is possible to add specific CSS class(es) to columns with help of "Columns settings -> CSS Class" parameter, for this enter column name or index in "Columns settings -> ID" parameter and a name of CSS class for the column in "Columns settings -> CSS Class" parameter. For example if you enter
mycol class name, you can place the following CSS rule to "CSS Styles" parameter in module settings to change font size and color:
TABLE TBODY TR TD.mycol
{
font-size: 20px;
color: red;
}
Regards,
ARI Soft