We’re now building a patch release to fix the custom target support, which will appear as 0.9.1. If all goes well we’ll make this available today (Friday 13th always good for quick patch releases…!).
Selecting custom targets should be working again in this release. We apologize for the inconvenience and please let us know if there is any functionality that doesn’t work for you.
I can compile with custom board too after update to 0.9.1, but when I close mbed studio and reopen it later I have to re-select my custom board in project manager. Previous choice is lost and project manager reverts to “regular” board …
A little problem seems persist in custom boards support …