...
Use iguana --service uninstall to remove the service entry.
Delete the iguana.exe binary that is typically in C:\program files\iguanax\ - this is safe to do any time since it’s just got the application executable - not your data.
Then remove C:\ProgramData\iNTERFACEWARE\IguanaX\
This is working folder for Iguana which contains all your dataIt’s up to you if you want to remove the iNTERFACEWARE folder too.
You can also choose whether or not you want to remove Git. This is installed typically in:
C:\Program Files\Git\
...