[SOLVED (kind of)] IntelliJ 2017.3 keeps resetting project JDK version

 Hi everyone

We are working on rather large and old web application built with IBM JDK 1.7. It uses Gradle 2.13 which wont work with IBM JDK, so it is set to use Java 8. This is all configured and worked very well until the update from 2017.2 to 2017.3.

Now, whenever executing any Gradle task, the project SDK gets reset to the one set for Gradle. Gradle 2.13 won't work with IBM JDK 1.7 and vice versa.

The gradle configuration has the source and target versions set to 1.7. Currently Gradle is configured to use the default wrapper. Might setting it to use a wrapper task configuration a solution? But what would I need to put into build.gradle?

As a work around, we have tried to write-protect ./idea/misc.xml, which didn't help.

Similar posts have been found here, but they didn't seem to help with our problem. Any ideas where to start looking? Would we really have to downgrade IntelliJ?

Thx & Cheers

Lugi