Looking at the Kodi.log it states Kodi 16 whereas hardware and system.log states 7.95.010 which is Kodi 17.
Have you upgraded? If you are running Kodi 17 then you need to be aware that the cache naming convention changed.
It should look like: This is what I tried.
<cache>
<buffermode>1</buffermode>
<memorysize>139460608</memorysize>
<readfactor>20</readfactor>
</cache>
This didn't work:
<cache>
<buffermode>1</buffermode>
<memorysize>209190912</memorysize>
<readfactor>60</readfactor>
</cache>