IF you are working with a file that is hosted from a server, the License Key error message after a client crash is a known issue and clears up on its own if you go get a cup of coffee and then come back and try again to open the file.
On the crash itself, does this happen only for a specific file? Only when copying objects from a specific layout or pasting into a specific layout?
If this is specific to a file or layout, then there may be a problem with that specific file or layout. If so, take it or a recent back up copy down off the server and run a recover on it to see if any problems are reported.
Things to keep in mind about Recover:
- Recover does not detect all problems
- Recover doesn't always fix all problems correctly
- Best Practice is to never put a recovered copy back into regular use or development. Instead, replace the damaged file with an undamaged back up copy if this is at all possible. You may have to save a clone of the back up copy and import all data from your recovered copy to get a working copy with the most up to date information possible.