Try to increase the general size in the begining of skin.xml :
put it to 110 or 120 instead of 100 and see if it work:
<fonts>
<font filename="lcd.ttf" name="LCD" scale="100" />
<font filename="ae_AlMateen.ttf" name="Replacement" scale="100" replacement="1" />
<font filename="tuxtxt.ttf" name="Console" scale="100" />
<font filename="nmsbd.ttf" name="Arial" scale="100" />
<font filename="/usr/share/enigma2/DMConcinnity-HD-Transp/fonts/HandelGotDBol.ttf" name="Regular" scale="100" />
<font filename="/usr/share/enigma2/DMConcinnity-HD-Transp/fonts/ds_digital.ttf" name="Digital" scale="100"/>
</fonts>
If you want change font size in an section (like channel selection window for example) found the Channel selection section of the code, and increase the font size
<widget name="list" position="20,110" size="700,450" scrollbarMode="showOnDemand" selectionPixmap="DMConcinnity-HD-Transp/menu/sel700x30.png" colorServiceDescription="grey" colorServiceDescriptionSelected="grey" picServiceEventProgressbar="DMConcinnity-HD-Transp/progcl.png" foregroundColorServiceNotAvail="#777777" serviceItemHeight="30" serviceNumberFont="Regular;21" serviceNameFont="Regular;23" serviceInfoFont="Regular;21" transparent="1" />
Instead of serviceInfoFont="Regular;21 try serviceInfoFont="Regular;25
You should do this by hand...