I would have helped him with his bugs if I knew him, but I don't.
If he would take the help. Jup it would be almost everything easy to fix.
For the missing files guys. Create a word pad file with that text.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Enterbrain\RGSS3\RTP]
"RPGVXAce"="G:\\Steam\\SteamApps\\common\\RPGVXAce\\rtp"
[HKEY_LOCAL_MACHINE\SOFTWARE\Enterbrain\RGSS3\RTP]
"RPGVXAce"="G:\\Steam\\SteamApps\\common\\RPGVXAce\\rtp"
you should enter the correct drive by yourself
rename it .reg
run it
hope that it work