This may or may not have fixed the initial problem. However, as of Dec 2018 SciDaVis is using such an old qwt that it is not going to be compilable under many circumstances. As the most recent version of qwt is not compatible, a compatible version should probably be packaged with the SciDaVis code until it compiles against the current versions.
Encrypted repetative files may be susceptible to a frequency analysis attack
add frequency analysis to check utilities
update help to include warning to compress files before encrypting
Encrypted repetative files may be susceptible to a frequency analysis attack
Merge branch 'master' of https://github.com/gutow/ParaCrypt
README.md updated for main repository
objectify the utility functions for encryption and decryption