Can't route wire on PCB

I have been busy designing a control card for my CNC router with an Arduino Mega. As of yesterday I am unable to place or move existing traces. I can connect two parts with a trace but when I want to move the trace it jumps to the left upper corner of the pcb. Even when I want to place a new part on the pcb it jumps to the same corner.

When I take a example from the Fritzing library I can ad and move parts as I like.

Steps I took that resulted in the problem:

I removed and installed the latest version. The design above is also made with the latest version.

What I expected should have happened instead:

My version of Fritzing and my operating system:


Please also attach any files that help explaining this problem

Post the sketch with the 7th button above.

What OS?

Sometimes shutting down FZ and restating fixes stuff, just save it first.

I am with @Old_Grey on this one. Post the fritzing sketch here and someone will have a look at it to see why this is happening (hopefully).

The OS is Windows 10 64Bit. Everything worked fine up until a sudden moment.
I will post the sketch this evening.
Did multiple restarts with no luck.

Well I found the problem. The grid size was wrong. It was set to 0. instead of 0.1 or so.