you're doing something strange then.
did you mean 2.5 GB? that's much too big, even for both games combined (perhaps it contains all the incremental patches as well?).
are you extracting the game files directly from an archive? or using an installer?
%appdata% is a shortcut to C:\Users\Your User Name\AppData\Roaming (unless you are on windows XP) there should be a FocasLens folder there if you installed correctly
what does the games title screen look like? if it says "-shard of dreams-" or "-ユメノカケラ-" then you are using the expansion.
if you are using a user account and running the installer as admin, you will have problems.
the "Game Data Invalid" error is most likely from running the installer without japanese locale (or having foreign characters in the install path).
the simple solution is to start over from the beginning and run the game installers with a japanese locale emulator. you do not need to uninstall whatever you did already.
make sure you are installing the game files to a location that has ONLY japanese or english characters in the ENTIRE path (this is for compatibility with shift-jis).
the default install path is fine.
if you are extracting from an archive or other weird stuff, you can fix it manually (last resort). make sure you know how to find %appdata%.
long instructions
install, extract, or move the base game to c:\game\FocasLens\tpdp (this must be the root folder i.e. C:\game\FocasLens\tpdp\gn_enbu.exe must exist)
the folder %appdata%\FocasLens\幻想人形演舞 must exist, create it if you need to.
inside the folder must be a text file called gn_enbu.ini, create it if it does not exist.
the content of gn_enbu.ini must look like this (including the empty line at the end):
[InstallSettings]
InstallPath=C:\game\FocasLens\tpdp
you can install somewhere other than C:\game\FocasLens\tpdp but then gn_enbu.ini MUST be saved as shift-jis if the path contains non-english characters
if that doesn't work then you are doing something bizarre and will need to use a proper installer. you can also try setting your system locale to japanese.
if you are using the expansion, do it again but replace "%appdata%\FocasLens\幻想人形演舞" with "%appdata%\FocasLens\幻想人形演舞-ユメノカケラ-" and "gn_enbu.ini" with "install.ini"
2.5Go is the archive downloaded. I suppose the site will let dl a big one for get a better stats, or something... The game alone (the gn_enbu.exe) is 5,44Mo and the japanese version of the game (orig_gn_enbu.exe) almost the same, a little less.
I finally try to go on Touhou Online, and i find a way to get an archive with the extension too, this entire folder is on 1,14Go. (respectively 727Mo for the vanilla and 441Mo for the extension)
About installation :
I get the game via archives, so its surely not installed correctly.
I know how to go on appdata (i have even a shortcut on my folder explorer) and beetween "discord" and "Google" they are no "FocasLens".
The only game who will work "normally" (if we exclude the numbers problem) is named ingame "幻想人形演舞"
Its the normal one.
Sadly, everytime i try to run the .exe when i use the japanese unicode or LEGUI, i get the Invalid data.
"start over from the beginning and run the game installers with a japanese locale emulator."
Once i extract the archive with winrar, i just need to open the new forlder created and run the .exe . i don't have any installation required.
"create it if you need to."
I do that i create all folder on the long instruction.
I get a configuration parameter for gn_enbu.ini (so its okay, i guess) but i didn't understand about the shift-jis things bugs me. And i don't know what to do next.
I screen my folder for the steps made.
"C:\game"
(https://image.noelshack.com/fichiers/2017/44/5/1509677084-capture-d-ecran-206.png)
- Since i woke up of my dumbness, i understand how to use the SoD interface patch Build for get the extension.
But for some reason, when i do that its bugued. (https://image.noelshack.com/fichiers/2017/44/5/1509680339-capture-d-ecran-208.png))
Even after the black screen, the game can be loaded. i didn't see what yukari say to me, because here, the black screen didn't work. I see my character on the bus, but i cannot see the dialogue box or Yukari I managed to go foward on the game, i even get a screen (https://image.noelshack.com/fichiers/2017/44/5/1509682100-capture-d-ecran-209.png) i can play more or less normally. i can't see my option when i paused the game. but when i go to the first fight, the game crash.
lucky me, i didn't patch the folder screened, but a copy.
"Appdata\Roaming"
(https://image.noelshack.com/fichiers/2017/44/5/1509674943-capture-d-ecran-205.png)
And right now i don't know what to do. (i guess the 'noob' on the title isn't stealed. lel.)
EDIT :
I try to use the gn_enbu presented on my screen "C:/game" with LEGUI, ans thats worded. i get a lot of kanjis on my 'profile' but the number is here.