Load .slk file format (excel can open it, but can't import it to matlab)

I am trying to import in matlab a file with extension '.slk'. Although in excel it is opened as a normal file, with info in differents cells, I cannot load it in Matlab as a cell structure, as a normal excel would. I have to process many of those files, that's why exporting as csv from excel is not doable...

The closest I have got is to use the function 'extractFileText'. Either with differents options for 'encoding' or without them, I can only get a string with the info like the code below. Before posting the code, I attach a picture of how the file looks in an excel-like software:

It somehow includes the info I am trying to extract, but I don't know how to deal with a string of this kind, and I wonder whether there is a way of importing the data as a cell structure or variables for each colum...

Could anyone, please, help?

>> data = extractFileText(excelname)


data = 
   data = 
    "ID;PANYMAZE
     P;PGeneral
     P;FArial;M200
     P;EArial;M0
     B;X10;Y7
     F;R1;M240
     F;R2;M240
     F;R3;M240
     F;R4;M240
     F;R5;M240
     F;R6;M240
     F;R7;M240
     F;C1;SM1;FF0R
     F;W1 1 5
     F;C2;SM1;FF0R
     F;W2 2 7
     F;C3;P0;SM1;FG0L
     F;W3 3 10
     F;C4;P0;SM1;FG0L
     F;W4 4 5
     F;C5;P0;SM1;FG0L
     F;W5 5 12
     F;C6;SM1;FF0R
     F;W6 6 6
     F;C7;P0;SM1;FG0L
     F;W7 7 18
     F;C8;P0;SM1;FG0L
     F;W8 8 14
     F;C9;SM1;FF1R
     F;W9 9 27
     F;C10;SM1;FF1R
     F;W10 10 24
     F;X1;Y1;FG0L
     C;X1;Y1;K"Test"
     F;X2;Y1;FG0L
     C;X2;Y1;K"Animal"
     F;X3;Y1;FG0L
     C;X3;Y1;K"Treatment"
     F;X4;Y1;FG0L
     C;X4;Y1;K"Code"
     F;X5;Y1;FG0L
     C;X5;Y1;K"Stage"
     F;X6;Y1;FG0L
     C;X6;Y1;K"Trial"
     F;X7;Y1;FG0L
     C;X7;Y1;K"Segment_of_test"
     F;X8;Y1;FG0L
     C;X8;Y1;K"Apparatus"
     F;X9;Y1;FG0L
     C;X9;Y1;K"Zona_de_no_refuerzo_._time"
     F;X10;Y1;FG0L
     C;X10;Y1;K"Zona_de_refuerzo_._time"
     C;X1;Y2;K1
     C;X2;Y2;K1
     C;X3;Y2;K""
     C;X4;Y2;K""
     C;X5;Y2;K"First stage"
     C;X6;Y2;K1
     C;X7;Y2;K"0 - 300 secs."
     C;X8;Y2;K"New apparatus"
     C;X9;Y2;K279.4
     C;X10;Y2;K20.6
     C;X1;Y3;K1
     C;X2;Y3;K1
     C;X3;Y3;K""
     C;X4;Y3;K""
     C;X5;Y3;K"First stage"
     C;X6;Y3;K1
     C;X7;Y3;K"300 - 600 secs."
     C;X8;Y3;K"New apparatus"
     C;X9;Y3;K294.2
     C;X10;Y3;K5.8
     C;X1;Y4;K1
     C;X2;Y4;K1
     C;X3;Y4;K""
     C;X4;Y4;K""
     C;X5;Y4;K"First stage"
     C;X6;Y4;K1
     C;X7;Y4;K"600 - 900 secs."
     C;X8;Y4;K"New apparatus"
     C;X9;Y4;K300.0
     C;X10;Y4;K0.0
     C;X1;Y5;K1
     C;X2;Y5;K1
     C;X3;Y5;K""
     C;X4;Y5;K""
     C;X5;Y5;K"First stage"
     C;X6;Y5;K1
     C;X7;Y5;K"900 - 1200 secs."
     C;X8;Y5;K"New apparatus"
     C;X9;Y5;K293.0
     C;X10;Y5;K7.0
     C;X1;Y6;K1
     C;X2;Y6;K1
     C;X3;Y6;K""
     C;X4;Y6;K""
     C;X5;Y6;K"First stage"
     C;X6;Y6;K1
     C;X7;Y6;K"1200 - 1500 secs."
     C;X8;Y6;K"New apparatus"
     C;X9;Y6;K300.0
     C;X10;Y6;K0.0
     C;X1;Y7;K1
     C;X2;Y7;K1
     C;X3;Y7;K""
     C;X4;Y7;K""
     C;X5;Y7;K"First stage"
     C;X6;Y7;K1
     C;X7;Y7;K"1500 - 1800 secs."
     C;X8;Y7;K"New apparatus"
     C;X9;Y7;K300.0
     C;X10;Y7;K0.0
     E
     "

Answer 1

[millercommamatt]

data = readtable('your_spreadsheet.slk','FileType','spreadsheet');