The standard delivery format of Solargis data files is .csv and when you open such file using excel, all data values may be in the first column.
By default, all values should be in numeric format. However, if your computer recognizes ',' or 'comma' as the decimal character instead of '.' some values may appear in date format. In such case, you may want to change the file extension to .txt and then open with excel.
You can then convert all data from the first column to multiple columns using following steps: