Error occurred while installing Start8 1.15

Hi,
I installed Start8 version 1.15 so that I could return the Start button on my Windows 8. At the end of the installation I ran into the error message that I have attached here today. Whoever knows the solution please share your ideas.

Error message:
On post install, Line 63: attempt to compare nil with number stack traceback: 1:[On Post install] Line 63 in main chunk
