magic mouse1 can NOT be used

hi there,
BTT cannot recognized my magic mouse1 now.

My imac system is macOS High Sierra iOS10.13.15 and BTT version is 2.5.30.

The mouse1 is normal using in the other apps,but can not be find in BTT.
I tryed the old version of BTT ,it can be normal for about few minutes and still can not fix it...

what to do now.....

Bought a licence some time ago and I've just got a new iMac with a new magic mouse and get the same thing.
Any solutions?