5mW Astronomy Green Laser Pointer Repair Suggestion

I have to claim about my 50mW green laser pointer that I am using for astronomy.

It worked perfectly when I received it. On the first night, I used it for showing stars to members of my atrophies association. The green laser is very bright at night. It is an enough power one.
I always mount it on telescope, but the microswitch got broken after nearly one year and a half I used it.

I tried to dismount the device using a clamp, but I didn’t succeed.
I would appreciate a correct suggestion to recover my laser pointer. Waiting for your help.

More detail of the laser pointer needed (Model, photo, datasheet......). The link is unhelpful.

Is it a SPAM ad for a laser?

This is my laser pointer, but the on/off press button has stopped work.

**broken link removed**

Is there any method to get the press button out from the hole?

If this one is the same with the one I dismantled before, you should press the button until it's beneath the casing, then twist the casing and yank it out. The rest can be worked out hopefully.

Vizier87