As Montis suggests, double check that you have enabled the extension before loading your campaign. If you have and you still can't see the "Parse" tab in a new creature (you need to create a new creature, it's not in the Bestiary list) then please recreate the issue and compile the FG logs and post them here - details on compiling the FG logs can be found in the FG Wiki here:
https://fantasygroundsunity.atlassia...o+Compile+Logs - use Method 3 from within the campaign that isn't working correctly.