Hello,
For this issue, I think you would either have to change the number formatting on the 'Score' column or insert an extra column on your sheet with a formula to determine if the value in 'Score' meets your criteria.
To change the number formatting, highlight all the rows under the 'Score' column and go to the menu that runs across the top of your spreadsheet → Format → Number → Automatic. This for example will change a '10/15' to '10' and then '10' would work as your Autocrat merge condition.
However, I think it would be much more efficient to just add a new column to the right of your 'Score' column and insert a formula such as =IF(GTE(B2,10),"yes","") which will tell you 'yes' if the number in the 'Score' column is greater than or equal to 10.
Then you would point Autocrat to look at this column and use 'yes' as your merge condition. Hope this helps!