Frog is an integration of memory-based natural language processing (NLP) modules developed for Dutch. All NLP modules are based on Timbl, the Tilburg memory-based learning software package.
A, OK. In fact it will work with older versions. But the (seldom used) word-corrections feature will fail.
I will soon release a new libfolia, and then a new frog too, with fixes for memory leaks
libfolia should probably be released for the frog release to work, now the release is broken because of this missing dependency.