As of VIMP 4.2.0 it is possible to check the entered license key via a task or to set it again.
To check the license key execute the following:
./vimp framework:licensekey --check
To reset the license key, do the following:
./vimp framework:licensekey --set=y
Important note:
In VIMP versions less than 6.x, please use the command /symfony instead of /vimp in the above commands.