uninstall CSP
now after you successfully remove CSP from your computer
delete this ( to make a fresh install )
C:\Users\Administrator(Username)\Documents\CELSYS
C:\ProgramData\CELSYS\CLIPStudio
C:\Program Files\CELSYS
install again CSP
and Copy the folder ( Bold )
Program Files x64\
CELSYSor if you have 32bit copy the x86/
CELSYS and paste it to C:\Program Files and overwrite all
now install the materials CSPALL1 (700mb + ) or the divided parts from the material you get from celsys
Now Ignore step 9 To 17 ( this step is for translating the materials in CSP )
Do not rebuild the material database from Clip Studio ( this will translate the materials in english )

you should have this menu ( japanese text of materials )

Check if the problem still exist ( if it still exist recheck if you miss some step in deleting )
in future
just do not touch the rebuild materials list and the step 9 to 16 ( translation of materials )
last 3 weeks i tried step 9 to 16 rebuilding database so i can organize my materials .. when i did that i lost all my pencil brush and other stuff texture is missing it become soft brush.. and decoration brush is missing become circle like yours
luckily i have my backup files before i did an experiment
Libraries\Documents\celsys <= copy this folder.. this is the setting you made for CSP ... like Shortcut keys .. PenPressure setting .. your brushes .. Workflow layout and Etc ..