nxcomp/nxproxy automatically removes the corrupted cache files at the time it tries to load them and fails.

If you suspect that a bad cache file is preventing the session from starting, you
may want to force the removal of all the existing cache files.

This can achieved by either selecting NX Client -> Advanced -> Cache -> Clean all cache files or by removing the content of the .nx/cache* and .nx/images directories in your home.