Are you using Windows 32 bit? If so just add this to your registry (change the "InstPath" to your where you store the game) :
[HKEY_CURRENT_USER\Software\propeller]
[HKEY_CURRENT_USER\Software\propeller\あやかしびと]
"InstMode"=hex:02,00,00,00
"InstPath"="C:\\Ayakashibito"
[HKEY_CURRENT_USER\Software\propeller\あやかしびと\System]
"gbFullScreenFlag"=hex:00,00,00,00
"gnWindowLeft"=hex:18,01,00,00
"gnWindowTop"=hex:46,00,00,00
"gdwWindowWidth"=hex:20,03,00,00
"gdwWindowHeight"=hex:58,02,00,00
"gdwWindowBpp"=hex:18,00,00,00