Your licenses will be fine. You have only used one license, since you are only installed on one machine. It doesn't matter how many times you uninstall and re-install, although it could mean that activation might need to be done over the phone, but even that will only happen after numerous uninstalls and re-installs.

If you are running volume license editions of software you have even less to worry about since the same key is used for every install. And unless you're installing software on more machines than you have licenses for, than you will be OK.