Hello, I think that this dependency was introduced in version 6.8. As alternative workarounds: Java SE version may include JavaFX. Use an older JRE that includes JavaFX. Use an older ACIDE environment (e.g., that distributed with DES 6.7). It suffices to swap the old DES binary with the new one (either des.exe, or des or des_start depending on the OS). Updating ACIDE to a current Java version is a huge amount of work, which can be done if volunteers are willing to do it. Hope this helps and all the...