Can't route wire on PCB

bugs
1

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.
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What I expected should have happened instead:

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My version of Fritzing and my operating system:

Latest.
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Please also attach any files that help explaining this problem

2

Post the sketch with the 7th button above.

What OS?

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

3

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).

4

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.

5

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