Go to the game's install directory where the ReShade files were installed. Find the file named "ReShade.ini" and open it in a text editor, Notepad or the like will work fine.
Find the section labeled "[OVERLAY]" in the file.
Look for two lines, first line starting with "Docking=" and the second line "Window=".
These are the two lines you will need to edit.
Docking=[Docking][Data],DockSpace ID=0x7E010B79 Window=0x995B0CF8 Pos=8,,8 Size=1350,,752 Split=X, DockNode ID=0x00000001 Parent=0x7E010B79 SizeRef=500,,768 Selected=0x54723243, DockNode ID=0x00000002 Parent=0x7E010B79 SizeRef=1926,,768 CentralNode=1
Window=[Window][Home],Pos=8,,8,Size=500,,752,Collapsed=0,DockId=0x00000001,,0,[Window][Add-ons],Pos=8,,8,Size=500,,752,Collapsed=0,DockId=0x00000001,,1,[Window][Settings],Pos=8,,8,Size=500,,752,Collapsed=0,DockId=0x00000001,,2,[Window][Statistics],Pos=8,,8,Size=500,,752,Collapsed=0,DockId=0x00000001,,3,[Window][Log],Pos=8,,8,Size=500,,752,Collapsed=0,DockId=0x00000001,,4,[Window][About],Pos=8,,8,Size=500,,752,Collapsed=0,DockId=0x00000001,,5,[Window][###editor],Collapsed=0,DockId=0x00000002,[Window][Viewport],Pos=0,,0,Size=1366,,768,Collapsed=0,[Window][Debug##Default],Pos=60,,60,Size=400,,400,Collapsed=0