Did you follow the link and read what was there? That's telling you where to find the error log file. There may well be one even if no windows opened at all. Please try that and confirm either way what you find.
Oh OK my bad, tried to run again just now, then checked the error log. Only one showing was from me opening up a very old version of VASL (forgot how bad it used to look)
So looks like it's not loading far enough to get an error log. Please note had to cut most of the error log off as was too big to post
Thanks for the help
-- OS Windows 10
-- Java version 1.8.0_311
-- VASSAL version 3.0.18
No Translation: ResourceExtracter.select
-- VASL version 5.8.1
java.io.IOException: Couldn't locate data in ovrBE: boards\overlays\ovrBE (The system cannot find the file specified)
at VASSAL.tools.DataArchive.getFileStream(DataArchive.java:122)
at VASL.build.module.map.boardPicker.Overlay.readData(Unknown Source)
at VASL.build.module.map.boardPicker.Overlay.setFile(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.parseOverlay(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.buildBoard(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.decode(Unknown Source)
at VASSAL.launch.BasicModule.decodeSubCommand(BasicModule.java:180)
at VASSAL.launch.BasicModule.decode(BasicModule.java:164)
at VASSAL.launch.BasicModule.decode(BasicModule.java:170)
at VASSAL.build.module.GameState.decodeSavedGame(GameState.java:559)
at VASSAL.build.module.WizardSupport$SavedGameLoader.loadSavedGame(WizardSupport.java:543)
at VASSAL.build.module.WizardSupport$SavedGameLoader.run(WizardSupport.java:530)
at VASSAL.build.module.WizardSupport$LoadSavedGamePanels$1$1.run(WizardSupport.java:603)
java.io.IOException: Couldn't locate data in ovrOC: boards\overlays\ovrOC (The system cannot find the file specified)
at VASSAL.tools.DataArchive.getFileStream(DataArchive.java:122)
at VASL.build.module.map.boardPicker.Overlay.readData(Unknown Source)
at VASL.build.module.map.boardPicker.Overlay.setFile(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.parseOverlay(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.buildBoard(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.decode(Unknown Source)
at VASSAL.launch.BasicModule.decodeSubCommand(BasicModule.java:180)
at VASSAL.launch.BasicModule.decode(BasicModule.java:164)
at VASSAL.launch.BasicModule.decode(BasicModule.java:170)
at VASSAL.build.module.GameState.decodeSavedGame(GameState.java:559)
at VASSAL.build.module.WizardSupport$SavedGameLoader.loadSavedGame(WizardSupport.java:543)
at VASSAL.build.module.WizardSupport$SavedGameLoader.run(WizardSupport.java:530)
at VASSAL.build.module.WizardSupport$LoadSavedGamePanels$1$1.run(WizardSupport.java:603)
java.io.IOException: Couldn't locate data in ovrOC: boards\overlays\ovrOC (The system cannot find the file specified)
at VASSAL.tools.DataArchive.getFileStream(DataArchive.java:122)
at VASL.build.module.map.boardPicker.Overlay.readData(Unknown Source)
at VASL.build.module.map.boardPicker.Overlay.setFile(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.parseOverlay(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.buildBoard(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.decode(Unknown Source)
at VASSAL.launch.BasicModule.decodeSubCommand(BasicModule.java:180)
at VASSAL.launch.BasicModule.decode(BasicModule.java:164)
at VASSAL.launch.BasicModule.decode(BasicModule.java:170)
at VASSAL.build.module.GameState.decodeSavedGame(GameState.java:559)
at VASSAL.build.module.WizardSupport$SavedGameLoader.loadSavedGame(WizardSupport.java:543)
at VASSAL.build.module.WizardSupport$SavedGameLoader.run(WizardSupport.java:530)
at VASSAL.build.module.WizardSupport$LoadSavedGamePanels$1$1.run(WizardSupport.java:603)
java.io.IOException: Couldn't locate data in ovrBE: boards\overlays\ovrBE (The system cannot find the file specified)
at VASSAL.tools.DataArchive.getFileStream(DataArchive.java:122)
at VASL.build.module.map.boardPicker.Overlay.readData(Unknown Source)
at VASL.build.module.map.boardPicker.ASLBoard.fixImage(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.buildBoard(Unknown Source)
at VASL.build.module.map.ASLBoardPicker.decode(Unknown Source)
at VASSAL.launch.BasicModule.decodeSubCommand(BasicModule.java:180)
at VASSAL.launch.BasicModule.decode(BasicModule.java:164)
at VASSAL.launch.BasicModule.decode(BasicModule.java:170)
at VASSAL.build.module.GameState.decodeSavedGame(GameState.java:559)
at VASSAL.build.module.WizardSupport$SavedGameLoader.loadSavedGame(WizardSupport.java:543)
at VASSAL.build.module.WizardSupport$SavedGameLoader.run(WizardSupport.java:530)
at VASSAL.build.module.WizardSupport$LoadSavedGamePanels$1$1.run(WizardSupport.java:603)