I'm the new designer for a business, the old designer has all the login info. HELP

I recently became the parttime graphics designer for a company. The old team was let go and they have all the login info, serial numbers, passwords, etc. for photoshop. I'm using photoshop for now becouse it's still on the computer but I dont have anything else. If i accidentally get logged out im screwed. I can't manage payments, accounts, products or anything. I can just use photoshop until it either expires or something else. Also, we don't know if they are still using it on the company's dime on their personal computer.

Is there a way for me to get all our info back, when all we have is the computer it's installed on? Is there a serial number or something we have with the program that can help us get it back? Also, I'm not totally sure if the company is paying for it or not. I just need to know if it's ours or not, how to take control of it and if it can be used on multiple computers. If anything, an email of the user would be nice so we can email them to surrender the info.

Any help is appreciated!