I just have downloaded and installed iReport 5.6 for Windows 10. Installation show ok. But if I try start ireport.exe splash window brings on screen and process stops.
What's the matter? I did found no log-file.
iReport was developed and the project was terminated before Windows10 came out.
The current report design tool that is being developed and supported is Jaspersoft Studio.
If you don't like (as me) to use the incredible slow JasperSoftStudio and also don't need any new features of JasperReports > 6.x, you could of course run iReport also in Windows10.
The only thing you should be aware: iReport was designed in NetBeans and is NOT compatible with any Java Version > 1.7
So you will have to install/copy a JRE7 to your local machine and edit the iReport.conf (located in your iReport install directory unter etc ... eg "C:\Program Files (x86)\Jaspersoft\iReport-5.6.0\etc\ireport.conf") and point to the JRE7 directory:
# default location of JDK/JRE, can be overridden by using --jdkhome <dir> switch
jdkhome="C:\\Program Files (x86)\\Java\\jre7"
keep in mind, that any (newer) Java Setup could tell you, that an installed Java 1.7 is unsecure and should be deinstalled - you must ignore this warning (or your JRE7 will be uninstalled automatically)
hth + regards