How can I escape ‘$’ character when a directory is named MSSQL$blabla

Hi, I need to access a folder which is named MSSQL$INSTANCENAME, but as there is '$' in the middle of the folder name. The part $INSTANCENAME is translated as a variable by the NSIS compiler, how can I bypass this problem. The folder name itself cannot be changed.

Thanks in advance

try MSSQL$$INSTANCENAME