The request for a "detailed paper" on TreeSize license key updates
: If your key is marked as invalid, ensure you are using the correct key for the version installed. If you merged multiple licenses into one, old individual keys may have been deactivated. exporting your current settings to a new installation? TreeSize | JAM Software FAQ - Knowledgebase treesize license key upd
Once maintenance expires, you can still use the version of TreeSize you currently have installed indefinitely. However, you will not be able to download new versions or the installer from the customer area unless you renew. The request for a "detailed paper" on TreeSize